Fix for getting auth url for hadoop-swift

Changes:
* use service catalog for getting auth url
* changes in unit tests

Change-Id: Ifa4767a14515709d602c6dcded3716980a1d47ef
Closes-bug: #1393758
Updated from global requirements

Change-Id: Ib5be0fbe083e8191624946bab1aba39b42935dac
Merge "Updated from global requirements"
Merge "Fix for getting auth url for hadoop-swift"