Rename test class for testing simple commands, add test
    
    The concensus in the review was that the name test_commands was
    more generic than test_ipa_cli.
    
    Add a test to change the password for sysaccount users using
    using ldappasswd to confirm that a segfault fix does not regress.
    
    https://pagure.io/freeipa/issue/7561
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>