Fix replica_promotion-domlevel0 test failures
    
    Integration test is failing due to wrong message being
    displayed by ipa. This issue was most probably introduced
    by PR:
    https://github.com/freeipa/freeipa/commit/f51869bf5214e2d2322f85bf72b7ae86b6893974
    Error messages for domain level 0 and >=1 cases were basically
    swapped. This PR is swapping them back.
    
    Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>