INT-2738 Add Missing getComponentType() Methods

JIRA: https://jira.spring.io/browse/INT-2738

Add a `getComponentType()` method for all handlers,
message producers, and message sources that implement
`NamedComponent` (see `SPCA.getComponentType()`).

Add rome as an optional dependency - STS complained
because AtomFeedHttpMessageConverter has a dependency
on it.

spring-integration-jmx/src/main/java/org/springframework/integration/jmx/NotificationPublishingMessageHandler.java

@@ -93,6 +93,11 @@ public class NotificationPublishingMessageHandler extends AbstractMessageHandler
 		this.defaultNotificationType = defaultNotificationType;
 	}
 
+	@Override
+	public String getComponentType() {
+		return "jmx:notification-publishing-channel-adapter";
+	}
+
 	@Override
 	public final void onInit() throws Exception {
 		Assert.isTrue(this.getBeanFactory() instanceof ListableBeanFactory, "A ListableBeanFactory is required.");

spring-integration-jmx/src/main/java/org/springframework/integration/jmx/OperationInvokingMessageHandler.java

@@ -106,6 +106,11 @@ public class OperationInvokingMessageHandler extends AbstractReplyProducingMessa
 		this.operationName = operationName;
 	}
 
+	@Override
+	public String getComponentType() {
+		return "jmx:operation-invoking-channel-adapter";
+	}
+
 	@Override
 	protected void doInit() {
 		Assert.notNull(this.server, "MBeanServer is required.");