make version of ts_mon compatible with appengine

infra_libs/ts_mon/common/test/metrics_test.py

Index: infra_libs/ts_mon/common/test/metrics_test.py
diff --git a/infra_libs/ts_mon/test/metrics_test.py b/infra_libs/ts_mon/common/test/metrics_test.py
similarity index 97%
rename from infra_libs/ts_mon/test/metrics_test.py
rename to infra_libs/ts_mon/common/test/metrics_test.py
index 09f0f8893f4e6aea253fa9b224288490405dff6a..a48e3d9f3c46da3a5f9327aff26e211ee6050fe0 100644
--- a/infra_libs/ts_mon/test/metrics_test.py
+++ b/infra_libs/ts_mon/common/test/metrics_test.py
@@ -8,13 +8,20 @@ import unittest
 
 import mock
 
-from monacq.proto import metrics_pb2
-
-from infra_libs.ts_mon import distribution
-from infra_libs.ts_mon import errors
-from infra_libs.ts_mon import interface
-from infra_libs.ts_mon import metrics
-from infra_libs.ts_mon import targets
+try:
+  from infra_libs.ts_mon import interface
+  from infra_libs.ts_mon.common import metrics
+  from infra_libs.ts_mon.common import distribution
+  from infra_libs.ts_mon.common import errors
+  from infra_libs.ts_mon.common import targets
+  from monacq.proto import metrics_pb2
+except ImportError: # pragma: no cover
+  import interface
+  from common import metrics
+  from common import distribution
+  from common import errors
+  from common import targets
+  from monacq.proto import metrics_pb2
 
 
 class FakeState(interface.State):