Just remove `_entityIdentity` and it still passes all tests
TODO: if this attempt incurs no other problems, then the T4 templates and sample apps must also be cleaned up
Merge branch 'remove_entityIdentity' of https://github.com/azabluda/TrackableEntitiesContrib into azabluda-remove_entityIdentity
Merge branch 'azabluda-remove_entityIdentity' into develop