[FIX] v2.ODataModel: fix TwoWay binding on created entries

- createEntry now sends request directly if batchGroup not deferred
- TwoWay changes on created entries allways creates a POST request
instead of a POST and a MERGE.
- if TwoWay change was successful - copy changes to model before
deleting the data copy.

Change-Id: I8e1699f857729ec8abd80237c1be4c15b2da6061
Merge "[FIX] v2.ODataModel: fix TwoWay binding on created entries"