Existing EPEL addition in spec_helper_acceptance wasn't actually working, so pulled in stahnma-epel and applied that in the bindings test, since that's the only place it's actually required.
This commit adds tests for the parameters that were previously untested.
Most of this testing is light, but all parameters of the module are now
called at least once. Generally we're testing the happy path, so these
need further work in future.
These tests are more or less parity with the rspec-system tests, though
dependent on a few patches that still have to make it into beaker and
beaker-rspec
