Test: messages can be sent/retrieved to/from Rmq cluster with SSL on

As per the code: is there a function to determine unit's release?
Otherwise, I'll just implement a generic function that run_on_unit
lsb_release -cs

zaza/openstack/charm_tests/rabbitmq_server/tests.py

@@ -138,6 +138,26 @@ class RmqTests(test_utils.OpenStackBaseTest):
         self._test_rmq_amqp_messages_all_units(units, ssl=False)
         logging.info('OK\n')
 
+    def test_408_rmq_amqp_messages_all_units_ssl_on(self):
+        """Send amqp messages with ssl enabled, to every rmq unit and
+        check every rmq unit for messages.  Standard ssl tcp port."""
+        # http://pad.lv/1625044
+        # TODO: exsdev: find out if there's a function to determine unit's release
+        # Otherwise run_on_unit: lsb_release -cs
+        # if (CompareHostReleases(self.client_series) >= 'xenial' and
+        #         CompareHostReleases(self.series) <= 'trusty'):
+        #     logging.info('SKIP')
+        #     logging.info('Skipping SSL tests due to client'
+        #                ' compatibility issues')
+        #     return
+        logging.debug('Checking amqp message publish/get on all units '
+                      '(ssl on)...')
+
+        units = zaza.model.get_units(self.application_name)
+        self._test_rmq_amqp_messages_all_units(units,
+                                               ssl=True, port=5671)
+        logging.info('OK\n')
+
     def test_412_rmq_management_plugin(self):
         """Enable and check management plugin."""
         logging.debug('Checking tcp socket connect to management plugin '