Fix inconsistent Unity unit tests
Fix inconsistent Unity unit tests

There are some error messages that come back a couple
different ways. Make these tests avoid false failures.
Also add 'MOUNTING' state to the FPG validation.

Change-Id: I33bbe76921033344dc9da9d3699fa92e30a58d36

hpe-storage/python-3parclient,hp-storage/python-3parclient