There was an exceptionally large amount of rote use of _get_regexes
throughout the samples tests, which doesn't provide any additional
explicitness in what's happening, and only couples the tests to the
base class in less useful ways.
Instead, when we call _verify_response, always also use the base
vanilla regexes for matching tests.
We also needed to add a few more variables to the list which always
need to be reset before testing against the static samples, because
uuids are often generated on the fly for the tests.
Lastly, test_keypairs needed some test specific surgery. It is so
highly normalized (with private test methods that take **kwargs) at
this point that it's not really clear that it's testing useful things
any more. This really needs denormalization.
Change-Id: I165b0f3aa2132373cb59982a5a5ded37b4fa1b52
ba0339f413