Roll infra_libs and gae_ts_mon in luci-py, and add field_specs to all metrics

appengine/machine_provider/metrics.py

Index: appengine/machine_provider/metrics.py
diff --git a/appengine/machine_provider/metrics.py b/appengine/machine_provider/metrics.py
index 13b8b7ad330ced156be88b8167b8a4148ea8e27c..4620c8e00b635a895a93d2ad682d55650238b45f 100644
--- a/appengine/machine_provider/metrics.py
+++ b/appengine/machine_provider/metrics.py
@@ -9,29 +9,29 @@ import gae_ts_mon
 
 lease_requests_deduped = gae_ts_mon.CounterMetric(
     'machine_provider/lease_requests/deduped',
-    description='Number of lease requests deduplicated.',
-)
+    'Number of lease requests deduplicated.',
+    None)
 
 
 lease_requests_expired = gae_ts_mon.CounterMetric(
     'machine_provider/lease_requests/expired',
-    description='Number of lease requests expired.',
-)
+    'Number of lease requests expired.',
+    None)
 
 
 lease_requests_fulfilled = gae_ts_mon.CounterMetric(
     'machine_provider/lease_requests/fulfilled',
-    description='Number of lease requests fulfilled.',
-)
+    'Number of lease requests fulfilled.',
+    None)
 
 
 lease_requests_received = gae_ts_mon.CounterMetric(
     'machine_provider/lease_requests/received',
-    description='Number of lease requests received.',
-)
+    'Number of lease requests received.',
+    None)
 
 
 pubsub_messages_sent = gae_ts_mon.CounterMetric(
     'machine_provider/pubsub_messages/sent',
-    description='Number of Pub/Sub messages sent.',
-)
+    'Number of Pub/Sub messages sent.',
+    [gae_ts_mon.StringField('target')])