Pylint: enable check for unused-variables

Unused variables may:
* make code less readable
* create dead code
* potentialy hide issues/errors

Enabled check should prevent to leave unused variable in code

Check is locally disabled for modules that fix is not clear or easy or have too many occurences of
unused variables

Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>
Reviewed-By: Stanislav Laznicka <slaznick@redhat.com>

ipaserver/plugins/baseldap.py

@@ -39,6 +39,8 @@ from ipalib.messages import add_message, SearchResultTruncated
 from ipapython.dn import DN
 from ipapython.version import API_VERSION
 
+# pylint: disable=unused-variable
+
 if six.PY3:
     unicode = str