Allow dots in dimension key name.

appengine/swarming/server/task_request_test.py

 #!/usr/bin/env python
 # Copyright 2014 The LUCI Authors. All rights reserved.
 # Use of this source code is governed by the Apache v2.0 license that can be
 # found in the LICENSE file.
 
 import datetime
 import logging
 import os
 import random
 import sys
@@ skipping 356 matching lines @@
       task_request.make_request(
           _gen_request(properties=dict(dimensions=[])), True)
     with self.assertRaises(datastore_errors.BadValueError):
       task_request.make_request(
           _gen_request(properties=dict(dimensions={})), True)
     with self.assertRaises(datastore_errors.BadValueError):
       task_request.make_request(
           _gen_request(
               properties=dict(dimensions={u'id': u'b', u'a:': u'b'})), True)
     task_request.make_request(
-        _gen_request(properties=dict(dimensions={u'id': u'b'})), True)
+        _gen_request(
+            properties=dict(dimensions={u'id': u'b', u'a.': u'b'})), True)
 
     with self.assertRaises(TypeError):
       task_request.make_request(
           _gen_request(properties=dict(env=[])), True)
     with self.assertRaises(TypeError):
       task_request.make_request(
           _gen_request(properties=dict(env={u'a': 1})), True)
     task_request.make_request(_gen_request(properties=dict(env={})), True)
 
     with self.assertRaises(datastore_errors.BadValueError):
@@ skipping 146 matching lines @@
         ndb.Key(task_request.TaskRequest, 0x7f14acec2fcfffff),
         task_request.request_id_to_key(0xeb5313d0300000))
 
 
 if __name__ == '__main__':
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   unittest.main()