Add test if replica is working after domain upgrade

Corresponds to the testcase described in
http://www.freeipa.org/page/V4/Replica_Promotion/Test_plan#Test_case:
_Replica_created_using_old_workflow_is_functional_after_domain_upgrade

https://fedorahosted.org/freeipa/ticket/5723

Reviewed-By: Martin Babinsky <mbabinsk@redhat.com>

pylint_plugins.py

@@ -230,6 +230,7 @@ ipa_class_members = {
             {'transport': ['put_file']},
             'put_file_contents',
             'get_file_contents',
+            'ldap_connect',
         ]},
         'replicas',
         'clients',