Test cases for ipa-replica-conncheck command
    
    Following test cases would be checked:
    - when called with --principal (it should then prompt for a password)
    - when called with --principal / --password
    - when called without principal and password but with a kerberos TGT,
      kinit admin done before calling ipa-replica-conncheck
    - when called without principal and password, and without any kerberos
      TGT (it should default to principal=admin and prompt for a password)
    
    related: https://pagure.io/freeipa/issue/9047
    
    Signed-off-by: Mohammad Rizwan <myusuf@redhat.com>