OGM-535 [Neo4j] Store regular embaddable as nodes

  This patcth will store regular embeddable as separate nodes.

  A regular embeddable is not part of a collection and
  it's not a composite identifier.
OGM-535 [Neo4j] Cache update embedded column query
OGM-535 [Neo4j] Test deletion of embedded properties
OGM-535 [Neo4j] Remove properties from embedded nodes