Reinstate public ctor for ReplyContainerProperties

The `JmsOutboundGateway.ReplyContainerProperties` and really can be used for options, like in the Java DSL.

Revert changes which applied package protected modifier for ctor and reinstate `public` ctor consequently

spring-integration-jms/src/main/java/org/springframework/integration/jms/JmsOutboundGateway.java

@@ -1524,10 +1524,6 @@ public class JmsOutboundGateway extends AbstractReplyProducingMessageHandler imp
 
 		private volatile Executor taskExecutor;
 
-		ReplyContainerProperties() {
-			super();
-		}
-
 		public String getSessionAcknowledgeModeName() {
 			return this.sessionAcknowledgeModeName;
 		}