RAX-AUTH:defaultRegion is added into the userForAuthenticateResponse object
including x-default-region header if it is available for the user
unnecessary typing that will be removed and not exactly what is under test anyway.
changed the IdentityV3HeadersTest to make sure default group shows up
removed lingering to-do for X-Default-Region
update mock service
still update to fix conflict
update test
fixing tests from the merge conflicts
Merge pull request #1126 from rackerlabs/REP-1001-Default-Region

Rep 1001 default region