Use zaqar v2 in integration tests

zaqar v1/1.1 has been deprecated since long. Though it's enabled
in the devstack plugin[1], this may cause some issues and potential
data loss. Better remove all it's usage.

[1] https://git.openstack.org/cgit/openstack/zaqar/tree/devstack/plugin.sh#n88

Change-Id: Ifa1636dcf296747735dc8d28c2feb108919c094d
diff --git a/functional/test_event_sinks.py b/functional/test_event_sinks.py
index 5d9f566..95d0d1a 100644
--- a/functional/test_event_sinks.py
+++ b/functional/test_event_sinks.py
@@ -12,7 +12,7 @@
 
 import uuid
 
-from zaqarclient.queues.v1 import client as zaqarclient
+from zaqarclient.queues.v2 import client as zaqarclient
 
 from heat_integrationtests.functional import functional_base
 
@@ -52,7 +52,7 @@
             }
         }
 
-        zaqar = zaqarclient.Client(conf=conf, version=1.1)
+        zaqar = zaqarclient.Client(conf=conf)
         queue = zaqar.queue(queue_id)
         messages = list(queue.messages())
         self.assertEqual(4, len(messages))