TEIID-2561: added support for cascading embeddble tables
TEIID-2561: adding the nested merge, but only insert is supported due to limitations from mongodb
TEIID-2561: added some nested merge functionality; insert only, update and delete will throw exception
TEIID-2561: added some nested merge functionality; insert only, update and delete will throw exception
Merge pull request #89 from rareddy/TEIID-2561

TEIID-2561