[Findit] Display last build bucket response to try job dashboard

appengine/findit/waterfall/test/monitor_try_job_pipeline_test.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.
 
 from datetime import datetime
 import json
 import time
 
 from common.waterfall import buildbucket_client
 from common.waterfall import failure_type
@@ skipping 408 matching lines @@
                 'report': {
                     'metadata': {
                         'infra_failure': True
                     }
                 }
             }
         })
     }
 
     expected_error_dict = {
-        'message': 'Compile failed unexpectedly.',
+        'message': 'Buildbucket reported a general error.',
         'reason': MonitorTryJobPipeline.UNKNOWN
     }
 
     self.assertEqual(
         monitor_try_job_pipeline._GetError(build_response, None, False),
         (expected_error_dict, try_job_error.INFRA_FAILURE))
 
   def testGetErrorUnknownBuildbucketFailure(self):
     build_response = {
         'result': 'FAILED',
@@ skipping 22 matching lines @@
     }
 
     expected_error_dict = {
         'message': 'No result report was found.',
         'reason': MonitorTryJobPipeline.UNKNOWN
     }
 
     self.assertEqual(
         monitor_try_job_pipeline._GetError(build_response, None, False),
         (expected_error_dict, try_job_error.UNKNOWN))