Replace provider setup system in control tests

Probably needs #721 first because of this (https://github.com/RedHatQE/cfme_tests/blob/master/utils/providers.py#L114), which is fixed in this (https://github.com/RedHatQE/cfme_tests/pull/721/files#diff-067948e89352c216ee9be7b28f3c8412R114)