Fix requeued jobs sometimes marking as failed in job status until res…

…tarted

If we don't clear currentJob from checkForRequeuedJob, then in unregisterWorker we are marking the status as failed.  The status would be fixed when we ended up starting the job, but if we were watching for the status it would briefly show the wrong status.

lib/Resque/Worker.php

@@ -529,6 +529,7 @@ protected function checkForRequeueJob() {
 			if(!Resque::redis()->ping()) {
 				$this->logger->log(Psr\Log\LogLevel::EMERGENCY, 'Redis instance is not active!');
 			}
+			$this->currentJob = null;
 		}
 	}