Allow sending all data typs on interfase

Signed-off-by: Osman Hadzic <osman.hadzic@secomind.com>

AstarteDeviceSDKCSharpE2E.Tests/AstarteAggregateDeviceTest.cs

@@ -119,10 +119,7 @@ public async void AggregateFromServerToDevice()
             astarteServerAggregateDatastream.AddListener(this);
 
             Dictionary<string, object> data = astarteMockDevice.MockDataDictionary;
-
-            data.Remove("datetime_endpoint");
-            data.Remove("datetimearray_endpoint");
-
+
             Thread.Sleep(500);
 
             await astarteHttpRequestTest
@@ -140,13 +137,10 @@ public void ValueReceived(AstarteAggregateDatastreamEvent e)
             dynamic jsonInfo = JsonConvert.SerializeObject(e.GetValues());
 
             Dictionary<string, object> data = astarteMockDevice.MockDataDictionary;
-            data["datetime_endpoint"] = new DateTime();
-            data["datetimearray_endpoint"] = new DateTime[0];
 
             astarteAggregateData = JsonConvert.DeserializeObject
                     <MockDataDevice>(jsonInfo.ToString());
 
-
             Assert.True(AstarteMockDevice.MockData.Equals(astarteAggregateData));
         }
     }