Fix passwd tests for machines where sssd is installed
    
    When sssd is installed, there is a second prompt after entering an
    invalid password. Since we check for this, we need to have an entry
    in that case, we should expect another 'Current Password:' prompt,
    provide the invalid password again, and then re-expect a token error
    
    references: https://bugzilla.redhat.com/show_bug.cgi?id=1659100