Updates for RHEVM PXE Provisioning
Adds the fixtureconf fixture

- Kept running into request.node._fixtureconf boilerplate, so now that's a fixture
Merge pull request #124 from seandst/fixtureconf-fixture

Adds the fixtureconf fixture
Merge pull request #92 from rlandy/provisioning_tests

Adding tests and fixtures for rhevm PXE provisioning
Added tests to verify circular reference of service
Merge pull request #111 from sshveta/servicecatalogs

Added tests to verify circular reference of services