orchestration convert API test Timeouts to respect build_timeout

Some tests have a hard-coded WaitCondition timeout, which would be better
controlled from the global timeout set in tempest.conf

We should ensure future tests follow this convention where Timeout values
are specified in the template.

Change-Id: Ie4a9048771e3a106e1d9c6b69f244461f6d5fd8d
Partial-Bug: #1297560
Merge "orchestration convert API test Timeouts to respect build_timeout"