Fix the option to match in the ipa-client-automount usage and man-page
    
    The command usage and man-page options may not match.
    In ipa-client-automount, fix to match usage and man-page.
    
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>