Update oslo to latest and greatest

This was done mainly to pull in the fixt to timeutils.set_time_override() so
we don't have to keep passing in utcnow() into it.

Change-Id: I9918d03c57b8fbdc3750c7cb072a1aff2b2c653d
WSGI: added the control for non empty X-PROJECT-ID

Closes-bug: #1228249

Change-Id: I6fbf0344fd45f9581a28a55ef852139b32e93ed7
Merge "Update oslo to latest and greatest"