Adding core test for derived entity type (and derived complex type) CRUD
Cleanings
Missing file from last commit
[OLINGO-260] provided auth request integration test on proxy
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/olingo-odata4
Various small fixes and improvements
[OLINGO-260] provided proxy entity create mechanism; still working on EntityCreateTestITCase since it seems to hang the integration tests when executed with others
[OLINGO-266] Merge remote-tracking branch 'origin/master' into olingo-266-ref