cd73509 config plugin: add a test ensuring EmptyModlist is returned

Authored and Committed by frenaud 2 years ago
    config plugin: add a test ensuring EmptyModlist is returned
    
    Add a test to test_config_plugin, that calls ipa config-mod
    with the same value as already present in LDAP.
    The call must return EmptyModlist.
    
    Related: https://pagure.io/freeipa/issue/9063
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>