Selenium fixture has better support for navigation fixtures

Given that the selenium fixture is only being used in its tests,
I thought now would be a good time to improve its interface to be
more useful. It can still navigate you to arbitrary URLs, but once
there it is contrained to using a navigation fixture. This allows
for a few assumptions to be made that drastically improve this
fixture's usability.
Provider tweaks to support Openstack backend

- Also more linty clean, and now knows about EC2System
Added package to check for, lints

- New package is for bz1010443
Merge pull request #155 from seandst/useful-selenium-fixture

Selenium fixture has better support for navigation fixtures
Merge pull request #157 from seandst/rhos-mgmtsys

Provider tweaks to support Openstack backend
Merge pull request #161 from seandst/appliance-tests-update

Added package to check for, lints
Adding dependency on TestBaseProvisioning
Merge pull request #167 from rlandy/provisioning_tests

Adding dependency on TestBaseProvisioning