Owlery returning all keys as per PR suggestion, nblast cosmetic comments on json manipulation

Author: ddelpiano

src/main/java/org/geppetto/datasources/ExecuteQueryVisitor.java

@@ -218,6 +218,10 @@ private void processResponse(String response, ADataSourceService dataSourceServi
 		try{
 			String customJson = "";
 			if(response.startsWith("[")) {
+				/* Checking if the server returns an array and if that's the case adding a dummy response 
+				 * object to fit the JSON into our standard Map<String, Object> representation. 
+				 * Regarding the String manipulation although ugly this is the most performant way of performing 
+				 * this task. */
 				customJson = "{\"response\":"+response+"}";
 				response = customJson;
 			}

src/main/java/org/geppetto/datasources/owlery/OWLeryResponseProcessor.java

@@ -28,14 +28,12 @@ public class OWLeryResponseProcessor implements IQueryResponseProcessor
 	 */
 	@Override
 	public QueryResults processResponse(Map<String, Object> response)
-	{
-		List<String> validKeys = Arrays.asList("hasInstance", "equivalentClass", "subClassOf", "superClassOf", "isSatisfiable", "value");
-		
+	{		
 		QueryResults results = DatasourcesFactory.eINSTANCE.createQueryResults();
 		List<String> headers = new ArrayList<String>();
 
 		for(String keyExtracted : response.keySet()) {
-			if(validKeys.contains((String)keyExtracted) && !headers.contains(keyExtracted)) {
+			if(!headers.contains(keyExtracted)) {
 				headers.add(keyExtracted);
 			}
 		}