Hyper-V tests can be refactored to avoid multiple mox.VerifyAll() calls

[Alessandro Pilotti]

The Hyper-V tests, specifically test_hypervap.py are currently using the mox framework for all the tests.

As a result, it's possible to move the mox.VerifyAll() call from the single tests to tearDown().

The advantages are:

1) Less code bloathing due to duplicated VerifyAll() calls at
   the end of each individual test

2) Ensure that VerifyAll() is called in cases in which the developer might
   forget about adding it at the end of the test

[Michael Still (mikal)]

Is this a good idea? I can't think of any other test which has its verify in the tear down. Are there existing examples?

[Alessandro Pilotti (alexpilotti)]

All our tests currently work with VerifyAll() in the tearDown except one, I'm currently investigating the cause.

I checked to be sure that asserts are properly logged and not masked by potential VerifyAll() exceptions.

[Claudiu Belu (cbelu)]

Tests have been refactored during Kilo and Liberty. Final patch that merged in Liberty: https://review.openstack.org/#/c/139798/

No longer valid.