ZhiQiang Fan ef3cc9c635 Removes use of timeutils.set_time_override
The set_time_override function in timeutils was written as a
helper function to mock utcnow for unittests before 'mock' was
generally used. Now that we have mock and fixture, we no longer
need to use it.

Change-Id: I7c3793d7a442dc85aec405041c3c9ce6f7503bd8
Closes-Bug: #1266962
2014-01-23 15:24:05 +08:00
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