Hard code order field for rietveld.py::get_pending_issues

rietveld.py

Index: rietveld.py
diff --git a/rietveld.py b/rietveld.py
index a03fe77e3e8d216ca0e8590919d62d800ffa423a..d4ac39bab08060ea3c6414d3b9ad32b986d266f0 100644
--- a/rietveld.py
+++ b/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."""