Unable to create ClusterRoles

Was discovered by user that the Operator never reconciles RBAC roles of a user with cluster roles.  The reason for this appears to be that we are currently requiring bucket name to be present, but since this is not allowed for cluster roles we never complete the role assignment to user.

Fix is simple.

Workaround: You can manually add the role to the group and Operator will not remove it, however you may see some annoying logs