ipatests: Check maxlife error message where minlife > maxlife specified
    
    When minlife > maxlife specified on commandline, it says:
    "ipa: ERROR: invalid 'maxlife': Maximum password life must be
    greater than minimum."
    
    But when minlife == maxlife specfied, It works.
    This test check that error message says what exactly it does
    
    related: https://pagure.io/freeipa/issue/9038
    
    Signed-off-by: Mohammad Rizwan <myusuf@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>