Server Upgrade: use ldap2 connection in fix_replica_agreements

https://fedorahosted.org/freeipa/ticket/4904

Reviewed-By: David Kupka <dkupka@redhat.com>

ipaserver/install/plugins/fix_replica_agreements.py

@@ -37,9 +37,7 @@ class update_replica_attribute_lists(Updater):
     def execute(self, **options):
         # We need an IPAdmin connection to the backend
         self.log.debug("Start replication agreement exclude list update task")
-        conn = ipaldap.IPAdmin(self.api.env.host, ldapi=True,
-                               realm=self.api.env.realm)
-        conn.do_external_bind(pwd.getpwuid(os.geteuid()).pw_name)
+        conn = self.api.Backend.ldap2
 
         repl = replication.ReplicationManager(self.api.env.realm,
                                               self.api.env.host,