ULG PATCH: BIRD: Fix timeout in case ip/subnet is not in the routing table

Fixes exceptions like this: ERROR: Exception occured while running a command:Traceback (most recent call last): File "/var/www/html/ulg.py", line 498, in commandThreadBody session.getRouter().runAsyncCommand(session.getCommand(),session.getParameters(),FakeSessionFile(session)) File "/var/www/html/ulgmodel.py", line 463, in runAsyncCommand return self.runRawCommand(c,outfile) File "/var/www/html/ulgbird.py", line 544, in runRawCommand l = sf.readline() File "/usr/lib/python2.7/socket.py", line 447, in readline data = self._sock.recv(self._rbufsize) timeout: timed out