Create a BotEvent when a bot is leased from Machine Provider

appengine/swarming/handlers_bot_test.py

Index: appengine/swarming/handlers_bot_test.py
diff --git a/appengine/swarming/handlers_bot_test.py b/appengine/swarming/handlers_bot_test.py
index 7f78261d1120d219e6db2291b559b23e836d8311..c76789dcf6aeb09965f74e7f47fc9d7acbddeed3 100755
--- a/appengine/swarming/handlers_bot_test.py
+++ b/appengine/swarming/handlers_bot_test.py
@@ -740,6 +740,8 @@ class BotApiTest(test_env_handlers.AppTestBase):
         },
         'event_type': unicode(e),
         'external_ip': u'192.168.2.2',
+        'lease_id': None,
+        'lease_expiration_ts': None,
         'message': u'for the best',
         'quarantined': False,
         'state': {
@@ -764,6 +766,8 @@ class BotApiTest(test_env_handlers.AppTestBase):
         },
         'event_type': u'bot_connected',
         'external_ip': u'192.168.2.2',
+        'lease_id': None,
+        'lease_expiration_ts': None,
         'message': None,
         'quarantined': False,
         'state': {