d0efb9e ipatests: refactor TestNTPoptions

Authored and Committed by tdudlak 4 years ago
    ipatests: refactor TestNTPoptions
    
    Move common and error messages to class scope to be reused again.
    
    Reviewed-By: Michal Polovka <mpolovka@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>