ipatests: Add tests for interactive chronyd config
    
    Add interactive configuration tests for
    ipa-server-install and ipa-client-install
    FreeIPA server as it is now is unable to
    configure NTP interactively for replica
    installations.
    
    Resolves: https://pagure.io/freeipa/issue/7908
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>