Unsmoke suspend rescue

Currently the Compute smoke tests test suspend and rescue operations. These smoke tests use an `OpenCloud\Rackspace` client (as opposed to an `OpenCloud\OpenStack` client). This client tests against the Rackspace Public Cloud which currently does not support suspend and rescue operations on the Compute service. Consequently, the smoke tests fail.

This PR removes the suspend and rescue tests from the smoke tests, allowing them to pass again.