[producer] do not throw exception if feature not implemented and null is set.

It applies to the case where the featuer is not supported too.

Author: makasim

RedisProducer.php

@@ -42,6 +42,10 @@ public function send(PsrDestination $destination, PsrMessage $message)
      */
     public function setDeliveryDelay($deliveryDelay)
     {
+        if (null === $deliveryDelay) {
+            return;
+        }
+
         throw new \LogicException('Not implemented');
     }
 
@@ -58,6 +62,10 @@ public function getDeliveryDelay()
      */
     public function setPriority($priority)
     {
+        if (null === $priority) {
+            return;
+        }
+
         throw new \LogicException('Not implemented');
     }
 
@@ -74,6 +82,10 @@ public function getPriority()
      */
     public function setTimeToLive($timeToLive)
     {
+        if (null === $timeToLive) {
+            return;
+        }
+
         throw new \LogicException('Not implemented');
     }