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

appengine/third_party/gae_ts_mon/__init__.py

 # Copyright 2015 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import google  # provided by GAE
 import imp
 import os
 import sys
 
 # Adds third_party to sys.path so the packages inside work.  Do not
@@ skipping 44 matching lines @@
 from infra_libs.ts_mon.common.errors import MonitoringInvalidValueTypeError
 from infra_libs.ts_mon.common.errors import MonitoringTooManyFieldsError
 from infra_libs.ts_mon.common.errors import MonitoringNoConfiguredMonitorError
 from infra_libs.ts_mon.common.errors import MonitoringNoConfiguredTargetError
 
 from infra_libs.ts_mon.common.helpers import ScopedIncrementCounter
 
 from infra_libs.ts_mon.common.interface import close
 from infra_libs.ts_mon.common.interface import flush
 
+from infra_libs.ts_mon.common.metrics import BooleanField
+from infra_libs.ts_mon.common.metrics import IntegerField
+from infra_libs.ts_mon.common.metrics import StringField
+
 from infra_libs.ts_mon.common.metrics import BooleanMetric
 from infra_libs.ts_mon.common.metrics import CounterMetric
 from infra_libs.ts_mon.common.metrics import CumulativeDistributionMetric
 from infra_libs.ts_mon.common.metrics import CumulativeMetric
-from infra_libs.ts_mon.common.metrics import DistributionMetric
 from infra_libs.ts_mon.common.metrics import FloatMetric
 from infra_libs.ts_mon.common.metrics import GaugeMetric
 from infra_libs.ts_mon.common.metrics import NonCumulativeDistributionMetric
 from infra_libs.ts_mon.common.metrics import StringMetric
 
 from infra_libs.ts_mon.common.targets import TaskTarget
 from infra_libs.ts_mon.common.targets import DeviceTarget