Complete TEIID-2700 and TEIDI-3137 to support JDG 6.3

This completes the pushing the changes upstream to support JDG 6.3.

Couple of adjustments were needed:
-  test case :  TestProtobufMetadataProcessor  had to be adjusted due to the DDLVisitor is now creating the NAMEINSOURCE, if an override isn't specified
-  test case:  TestInfinispanUpdateExecution  fixed it so that the hibernate indexes and JDG cache filestore content were created under the target directory.