Extend method for model factory
Defined collectionProto property
DEVP-2810
Merge pull request #595 from WarnerMusicGroup/DEVP-2810

DEVP-2810
Removed getItems
Merge pull request #591 from WarnerMusicGroup/Model_Factory_Extend

Extend method for model factory
Merge remote-tracking branch 'origin' into DEVP-2930