[INTERNAL] sap.ui.model.odata.ODataMetaModel

- renamed from sap.ui.model.odata.v2.ODataMetaModel
- add sap.ui.model.odata.ODataModel#getMetaModel
- add to testsuite
- use scenario as integration test (URL param oldOData=true)
- refactor structure of ODataMetaModel's JSON

PS1: PP with HMÜ
PS2: minor cleanup
PS3: PP with URE
PS4: rebased

Change-Id: I31e675b9c5c8b74f8c5fea6bc1b612b27b3a444c
JIRA: FLPUISERVICES2014-1084
JIRA: FLPUISERVICES2014-1096
Merge "[INTERNAL] sap.ui.model.odata.ODataMetaModel"