Exception saving VDB with non-relational models that have no "Data Source" name value

1) Create VDB
2) Add Virtual Model that has one Source model dependency to VDB. This should result in an "Empty" Data source name since this is not a source model.
3) Save VDB and get following exception stating that the data source name is basically required.

Caused by: javax.xml.bind.MarshalException

• with linked exception:
  [org.xml.sax.SAXParseException: cvc-complex-type.4: Attribute 'name' must appear on element 'source'.]
  at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:317)
  at com.sun.xml.internal.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:243)
  at javax.xml.bind.helpers.AbstractMarshallerImpl.marshal(AbstractMarshallerImpl.java:75)
  at org.teiid.designer.vdb.Vdb$2.tryToDo(Vdb.java:372)
  at com.metamatrix.core.modeler.util.OperationUtil.perform(OperationUtil.java:37)
  ... 51 more
  Caused by: org.xml.sax.SAXParseException: cvc-complex-type.4: Attribute 'name' must appear on element 'source'.
  at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(ErrorHandlerWrapper.java:195)