Apply useRefDataProps=true to substitution

[lgoltz]

The PR #1726 applies useRefDataProps=true to complex xml elements. In the example with https://inspire.ec.europa.eu/schemas/lcv/5.0/LandCoverVector.xsd this results in a complete mapping of all elements available in the reference data and in addition some more elements from a substitution.
Example from the reference data:

 <lcv:extent>
        <gmd:EX_Extent>
          <gmd:geographicElement>
            <gmd:EX_BoundingPolygon>
              <gmd:polygon>
                <gml:Polygon srsName="EPSG:25833" srsDimension="2">
                  <gml:exterior>
                    <gml:LinearRing>
                      <gml:posList>282891 5711071 474199 5711071 474199 5899407 282891 5899407 282891 5711071</gml:posList>
                    </gml:LinearRing>
                  </gml:exterior>
                </gml:Polygon>
              </gmd:polygon>
            </gmd:EX_BoundingPolygon>
          </gmd:geographicElement>
        </gmd:EX_Extent>
      </lcv:extent>

Mapping:

<Complex path="lcv:extent">
      <Primitive path="@xlink:type" mapping="lcv_extent_attr_xlink_type"/>
      <Primitive path="@xlink:href" mapping="lcv_extent_attr_xlink_href"/>
      <Primitive path="@xlink:role" mapping="lcv_extent_attr_xlink_role"/>
      <Primitive path="@xlink:arcrole" mapping="lcv_extent_attr_xlink_arcrole"/>
      <Primitive path="@xlink:title" mapping="lcv_extent_attr_xlink_title"/>
      <Primitive path="@xlink:show" mapping="lcv_extent_attr_xlink_show"/>
      <Primitive path="@xlink:actuate" mapping="lcv_extent_attr_xlink_actuate"/>
      <Primitive path="@nilReason" mapping="lcv_extent_attr_nilreason"/>
      <Primitive path="@gml:remoteSchema" mapping="lcv_extent_attr_gml_remoteschema"/>
      <Primitive path="@owns" mapping="lcv_extent_attr_owns"/>
      <Complex path="gmd:EX_Extent">
        <Primitive path="@id" mapping="lcv_extent_gmd_ex_extent_attr_id"/>
        <Primitive path="@uuid" mapping="lcv_extent_gmd_ex_extent_attr_uuid"/>
        <Complex path="gmd:geographicElement">
          <Primitive path="@xlink:type" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_xlink_type"/>
          <Primitive path="@xlink:href" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_xlink_href"/>
          <Primitive path="@xlink:role" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_xlink_role"/>
          <Primitive path="@xlink:arcrole" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_xlink_arc_9"/>
          <Primitive path="@xlink:title" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_xlink_ti_10"/>
          <Primitive path="@xlink:show" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_xlink_show"/>
          <Primitive path="@xlink:actuate" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_xlink_ac_11"/>
          <Primitive path="@uuidref" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_uuidref"/>
          <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_attr_gco_nilr_12"/>
          <Complex path="gmd:EX_GeographicBoundingBox">
            <Primitive path="@id" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_14"/>
            <Primitive path="@uuid" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_15"/>
            <Complex path="gmd:westBoundLongitude">
              <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_17"/>
              <Primitive path="gco:Decimal" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_18"/>
            </Complex>
            <Complex path="gmd:eastBoundLongitude">
              <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_20"/>
              <Primitive path="gco:Decimal" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_21"/>
            </Complex>
            <Complex path="gmd:southBoundLatitude">
              <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_23"/>
              <Primitive path="gco:Decimal" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_24"/>
            </Complex>
            <Complex path="gmd:northBoundLatitude">
              <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_26"/>
              <Primitive path="gco:Decimal" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_27"/>
            </Complex>
          </Complex>
          <Complex path="gmd:EX_BoundingPolygon">
            <Primitive path="@id" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_boundi_29"/>
            <Primitive path="@uuid" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_boundi_30"/>
            <Complex path="gmd:polygon">
              <Primitive path="@uuidref" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_boundi_32"/>
              <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_boundi_33"/>
              <Geometry path="." mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_boundi_34"/>
            </Complex>
          </Complex>
          <Complex path="gmd:EX_GeographicDescription">
            <Primitive path="@id" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_36"/>
            <Primitive path="@uuid" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_37"/>
            <Complex path="gmd:geographicIdentifier">
              <Primitive path="@xlink:type" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_39"/>
              <Primitive path="@xlink:href" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_40"/>
              <Primitive path="@xlink:role" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_41"/>
              <Primitive path="@xlink:arcrole" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_42"/>
              <Primitive path="@xlink:title" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_43"/>
              <Primitive path="@xlink:show" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_44"/>
              <Primitive path="@xlink:actuate" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_45"/>
              <Primitive path="@uuidref" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_46"/>
              <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_47"/>
              <Complex path="gmd:MD_Identifier">
                <Primitive path="@id" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_49"/>
                <Primitive path="@uuid" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_50"/>
                <Complex path="gmd:code">
                  <Primitive path="@gco:nilReason" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_52"/>
                  <Primitive path="gco:CharacterString" mapping="lcv_extent_gmd_ex_extent_gmd_geographicelement_gmd_ex_geogra_53"/>
                </Complex>
              </Complex>
            </Complex>
          </Complex>
        </Complex>
      </Complex>
    </Complex>

The mapping imcludes also EX_GeographicBoundingBox and EX_GeographicDescription even thought only EX_BoundingPolygon is used in the refernce data.
Expected is, that only the mapping contains only EX_BoundingPolygon.