ipatests: fix test_caless.py
    
    Commit e3f3584 introduced an additional prompt in ipa-server-install
    "Do you want to configure chrony with NTP server or pool address?".
    
    The test is building a string passed to stdin in interactive mode
    but this string has not been updated with the additional answer for
    this new question.
    
    This commit answers 'no' to the question and allows to proceed with
    the ipa server installation.
    
    Fixes: https://pagure.io/freeipa/issue/7969
    Reviewed-By: Tibor Dudlak <tdudlak@redhat.com>