Test suite for `serverroles` backend
Tests retrieving roles/attributes and setting server attributes in various
scenarios.
https://fedorahosted.org/freeipa/ticket/5181
Reviewed-By: Jan Cholasta <jcholast@redhat.com>
Reviewed-By: Martin Basti <mbasti@redhat.com>
Reviewed-By: Pavel Vomacka <pvomacka@redhat.com>