Include columns to the ErrorValidationResponse

[palagdan]

Resolves #271

response looks like this:

{
    "@id": "_:b0",
    "@type": "ValidationConstraintError",
    "columns": [
        "person",
        "lastName",
        "firstName"
    ],
    "constraintFailureEvidences": [
        {
            "@id": "_:b1",
            "firstName": "Peter",
            "lastName": "Hnizdo",
            "person": "http://onto.fel.cvut.cz/ontologies/s-pipes/examples/constraint-validation/people/person-2"
        },
        {
            "@id": "_:b2",
            "firstName": "Pavel",
            "lastName": "Hnizdo",
            "person": "http://onto.fel.cvut.cz/ontologies/s-pipes/examples/constraint-validation/people/person-1"
        }
    ],
    "constraintQuery": "# More than one person matches input parameters\n        PREFIX foaf: <http://xmlns.com/foaf/0.1/>\n\n        SELECT ?person (?lastNameOuter as ?lastName) ?firstName\n        WHERE {\n          {\n            SELECT (count(distinct ?p) as ?pCount)\n            WHERE {\n               ?p a foaf:Person;\n                  foaf:firstName ?firstName;\n                  foaf:lastName ?lastName;\n              .\n            }\n          }\n\n          FILTER(?pCount > 1)\n\n          ?person a foaf:Person;\n             foaf:lastName ?lastNameOuter;\n             foaf:firstName ?firstName;\n          .\n      }",
    "message": "More than one person matches input parameters",
    "module": "http://onto.fel.cvut.cz/ontologies/s-pipes/constraint-validation/construct-matched-person",
    "@context": {
        "ValidationConstraintError": "http://onto.fel.cvut.cz/ontologies/s-pipes/ValidationConstraintError",
        "module": "http://onto.fel.cvut.cz/ontologies/s-pipes/module",
        "message": "http://onto.fel.cvut.cz/ontologies/s-pipes/message",
        "constraintFailureEvidences": {
            "@id": "http://onto.fel.cvut.cz/ontologies/s-pipes/constraintFailureEvidences",
            "@container": "@list"
        },
        "columns": {
            "@id": "http://onto.fel.cvut.cz/ontologies/s-pipes/columns",
            "@container": "@list"
        },
        "person": {
            "@id": "http://onto.fel.cvut.cz/ontologies/s-pipes/person",
            "@type": "@id"
        },
        "lastName": {
            "@id": "http://onto.fel.cvut.cz/ontologies/s-pipes/lastName"
        },
        "firstName": {
            "@id": "http://onto.fel.cvut.cz/ontologies/s-pipes/firstName"
        },
        "constraintQuery": "http://onto.fel.cvut.cz/ontologies/s-pipes/constraintQuery"
    }
}