deprecate v2.0 API in multiple choice response

Change-Id: I7d6f4056e1451062fdffe1cce209a47689ea5271
Implements: bp deprecated-as-of-icehouse
Modified keystone endpoint-create default region

The default region is changed from regionOne
to RegionOne

Change-Id: I610174f7c4241ce7405f100e775fd03df676eeac
Closes-Bug: #1252299
Merge "Modified keystone endpoint-create default region"
Merge "deprecate v2.0 API in multiple choice response"