OGM-587 Added test case that shows the failure
OGM-587 Add the test case that shows the failure
OGM-587 Fix the failure in MongoDB

  Uses the entity id instead of the entity to get the collection.
OGM-587 Escape relationship type in Neo4j
OGM-587 Fix embedded associations in CouchDB

  Consider embedded properties when setting the rows in an embedded
  association
OGM-587 Add test case for null embedded