[FIX] sap.m.ObjectIdentifier: Fixed data binding and formatter

Implemented lazy initialization for the private aggregations.
Overwritten setProperty() for "text", "title" and "titleActive"
properties to ensure that the overwritten setters are used.
Extended the testpage. Added qUnit tests.

Change-Id: I29664a81265b0fed2bfa231a945d5ee34c53d192
CSS: 0120031469 0000835310 2014
Merge "[FIX] sap.m.ObjectIdentifier: Fixed data binding and formatter"