stevedore: blacklist 3.2 since pbr doesn't support it
stevedore: Only run tests if installed
Add testresources 0.2.7
testresources: test runner script isn't shipped; use testtools.run
Add oauthlib-0.6.2

This older version is needed for keystoneclient tests
Restrict the oauthlib version
Add correct oauthlib for python-keystoneclient
Unmask python-keystoneclient