9334290 ui_tests: add_host() support func in test_service

Authored and Committed by mreznik 6 years ago
    ui_tests: add_host() support func in test_service
    
    Add add_host() support func into test_service to
    create temp hosts.
    
    https://pagure.io/freeipa/issue/7441
    
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>