add launchpadlib timeout

er had hung in the gate on a launchpad network issue. Set the
timeout for launchpadlib in an attempt to prevent this in the
future.

Change-Id: Ib3585f0a2b502e306c42711815c40d17fd6520a9

elastic_recheck/bot.py

@@ -117,7 +117,8 @@ class RecheckWatch(threading.Thread):
         self.key = key
         self.lp = launchpad.Launchpad.login_anonymously('grabbing bugs',
                                                         'production',
-                                                        LPCACHEDIR)
+                                                        LPCACHEDIR,
+                                                        timeout=60)
 
     def display(self, channel, event):
         display = False