Discrimator values in versioned entities in one to many relations could cause problems when deleting relation

As discussed here: https://community.jboss.org/thread/1695?start=15&tstart=0 deleting a
reference between two classes using discrimator values in a one to many relation could result in an incorrect entity version on "one-side" that uses discriminator value of parent class.

Steps to reproduce: See attachhed testcase.