Remove Exception from IOS.onInit()

spring-integration-redis/src/main/java/org/springframework/integration/redis/channel/SubscribableRedisChannel.java

@@ -131,7 +131,7 @@ public class SubscribableRedisChannel extends AbstractMessageChannel
 	}
 
 	@Override
-	public void onInit() throws Exception {
+	public void onInit() {
 		if (this.initialized) {
 			return;
 		}

spring-integration-redis/src/main/java/org/springframework/integration/redis/inbound/RedisQueueInboundGateway.java

@@ -141,7 +141,7 @@ public class RedisQueueInboundGateway extends MessagingGatewaySupport implements
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		super.onInit();
 		if (!this.extractPayload) {
 			Assert.notNull(this.serializer, "'serializer' has to be provided where 'extractPayload == false'.");

spring-integration-redis/src/main/java/org/springframework/integration/redis/outbound/RedisQueueOutboundChannelAdapter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2013-2016 the original author or authors.
+ * Copyright 2013-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -99,7 +99,7 @@ public class RedisQueueOutboundChannelAdapter extends AbstractMessageHandler {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		super.onInit();
 		if (this.evaluationContext == null) {
 			this.evaluationContext = ExpressionUtils.createStandardEvaluationContext(getBeanFactory());

spring-integration-redis/src/main/java/org/springframework/integration/redis/outbound/RedisStoreWritingMessageHandler.java

@@ -240,7 +240,7 @@ public class RedisStoreWritingMessageHandler extends AbstractMessageHandler {
 	}
 
 	@Override
-	protected void onInit() throws Exception {
+	protected void onInit() {
 		this.evaluationContext =
 				ExpressionUtils.createStandardEvaluationContext(this.getBeanFactory());
 		Assert.state(!this.mapKeyExpressionExplicitlySet ||