[Findit] Re-org code.

appengine/findit/model/flake/flake_analysis_request.py

 # Copyright 2016 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 gae_libs.model.versioned_model import VersionedModel
 from model.flake.master_flake_analysis import MasterFlakeAnalysis
-from model.versioned_model import VersionedModel
 
 
 class BuildStep(ndb.Model):
   """Represents a build step on Waterfall or Commit Queue.
 
   For a build step on Commit Queue, the matching Waterfall build step could be
   added if found.
   """
 
   # The build step in which a flake actually occurred.
@@ skipping 112 matching lines @@
     self.is_step = other.is_step
     self.bug_id = other.bug_id
     self.user_emails = other.user_emails
     self.build_steps = other.build_steps
     self.analyses = other.analyses
 
   @property
   def on_cq(self):
     """Returns True if the flake is on Commit Queue."""
     return any(step.on_cq for step in self.build_steps)