[Findit] Add three sub-pipelines to analyze build failure.

appengine/findit/model/build_analysis.py

 # Copyright 2014 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 google.appengine.ext import ndb
 
 from model.base_build_model import BaseBuildModel
 from model.build_analysis_status import BuildAnalysisStatus
 
 
@@ skipping 21 matching lines @@
   @property
   def completed(self):
     return self.status in (
         BuildAnalysisStatus.ANALYZED, BuildAnalysisStatus.ERROR)
 
   @property
   def failed(self):
     return self.status == BuildAnalysisStatus.ERROR
 
   def Reset(self):  # pragma: no cover
-    """Reset to the state as if no analysis is run."""
+    """Resets to the state as if no analysis is run."""
     self.pipeline_url = None
     self.status = BuildAnalysisStatus.PENDING
     self.start_time = None
 
   # Information of the analyzed build.
   build_start_time = ndb.DateTimeProperty(indexed=True)
 
   # Information of analysis processing.
   pipeline_url = ndb.StringProperty(indexed=False)
   status = ndb.IntegerProperty(
       default=BuildAnalysisStatus.PENDING, indexed=False)
   start_time = ndb.DateTimeProperty(indexed=False)
   updated_time = ndb.DateTimeProperty(indexed=False, auto_now=True)
+
+  # Analysis result.
+  result = ndb.JsonProperty(indexed=False, compressed=True)