TASK: Post FastRabbit CLI errors to stdout

Some errors don't result in error logs in the corresponding Flow
project but are passed as plain string from the CLI sub request to the
FastRabbit.

Original: a15fed63efcc2fee31b7a18d1a644d52bf9213f7

Author: stephanschuler

Classes/Worker.php

@@ -102,6 +102,7 @@ public function executeMessage(Message $message)
                     $message->getNumberOfReleases() + 1,
                     $maximumNumberOfReleases + 1
                 );
+                $this->outputLine('Message: %s', join('', $commandOutput));
 
             } else {
                 $this->queue->abort($message->getIdentifier());
@@ -112,6 +113,7 @@ public function executeMessage(Message $message)
                     $message->getNumberOfReleases() + 1,
                     $maximumNumberOfReleases + 1
                 );
+                $this->outputLine('Message: %s', join('', $commandOutput));
             }
         }