INT-4383 Expose errorChannel in EnricherSpec

JIRA: https://jira.spring.io/browse/INT-4383

Author: hxc9

spring-integration-core/src/main/java/org/springframework/integration/dsl/EnricherSpec.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2016-2017 the original author or authors.
+ * Copyright 2016-2018 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.
@@ -42,6 +42,7 @@
  * @author Artem Bilan
  * @author Tim Ysewyn
  * @author Ian Bondoc
+ * @author Alexis Hafner
  *
  * @since 5.0
  */
@@ -96,6 +97,28 @@ public EnricherSpec replyChannel(String replyChannel) {
 		return _this();
 	}
 
+	/**
+	 * @param errorChannel the error channel.
+	 * @return the enricher spec.
+	 * @see ContentEnricher#setErrorChannel(MessageChannel)
+	 * @since 5.0.1
+	 */
+	public EnricherSpec errorChannel(MessageChannel errorChannel) {
+		this.handler.setErrorChannel(errorChannel);
+		return _this();
+	}
+
+	/**
+	 * @param errorChannel the name of the error channel bean.
+	 * @return the enricher spec.
+	 * @see ContentEnricher#setErrorChannelName(String)
+	 * @since 5.0.1
+	 */
+	public EnricherSpec errorChannel(String errorChannel) {
+		this.handler.setErrorChannelName(errorChannel);
+		return _this();
+	}
+
 	/**
 	 * @param requestTimeout the requestTimeout
 	 * @return the enricher spec.