Hard code order field for rietveld.py::get_pending_issues

This is needed for https://codereview.appspot.com/6814091/
which changes the default ordering on codereview searches.

R=maruel@chromium.org

Review URL: https://chromiumcodereview.appspot.com/11365157

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@166822 0039d316-1c4b-4281-b951-d872f2087c98

rietveld.py

@@ -70,9 +70,10 @@ class Rietveld(object):
 
   def get_pending_issues(self):
     """Returns an array of dict of all the pending issues on the server."""
-    return json.loads(self.get(
-        '/search?format=json&commit=2&closed=3&keys_only=True&limit=1000')
-        )['results']
+    # TODO: Convert this to use Rietveld::search(), defined below.
+    return json.loads(
+        self.get('/search?format=json&commit=2&closed=3&'
+                 'keys_only=True&limit=1000&order=__key__'))['results']
 
   def close_issue(self, issue):
     """Closes the Rietveld issue for this changelist."""