Pool semaphore should not be verbose.

celery/concurrency/processes/pool.py

@@ -465,7 +465,7 @@ class Pool(object):
         self._worker_handler = self.Supervisor(self)
         self._worker_handler.start()
 
-        self._putlock = threading.BoundedSemaphore(self._processes, verbose=True)
+        self._putlock = threading.BoundedSemaphore(self._processes)
         self._task_handler = self.TaskHandler(self._taskqueue,
                                               self._quick_put,
                                               self._outqueue,