Include enqueue and report timestamps in MQTT msg

Having the enqueue and report timestamp allows for better reporting
regarding the livecycle of a change.

Change-Id: Ia3915ea35853f007181d5660c361417175c29507

tests/unit/test_connection.py

@@ -492,6 +492,8 @@ class TestMQTTConnection(ZuulTestCase):
                           'test')
         self.assertEquals(mqtt_payload['buildset']['builds'][0]['result'],
                           'SUCCESS')
+        self.assertIn('timestamp', mqtt_payload)
+        self.assertIn('enqueue_time', mqtt_payload)
 
     def test_mqtt_invalid_topic(self):
         in_repo_conf = textwrap.dedent(

zuul/driver/mqtt/mqttreporter.py

@@ -13,6 +13,7 @@
 # under the License.
 
 import logging
+import time
 import voluptuous as v
 
 from zuul.reporter import BaseReporter
@@ -28,6 +29,7 @@ class MQTTReporter(BaseReporter):
         self.log.debug("Report change %s, params %s" %
                        (item.change, self.config))
         message = {
+            'timestamp': time.time(),
             'action': self._action,
             'tenant': item.pipeline.tenant.name,
             'zuul_ref': item.current_build_set.ref,
@@ -40,6 +42,7 @@ class MQTTReporter(BaseReporter):
             'ref': getattr(item.change, 'ref', ''),
             'message': self._formatItemReport(
                 item, with_jobs=False),
+            'enqueue_time': item.enqueue_time,
             'buildset': {
                 'uuid': item.current_build_set.uuid,
                 'builds': []