Add remaining deprecations for legacy metrics

- add a module to suppress legacy metrics from the Integration Graph
- move graph tests package to match src/main

Fix missed deprecation and checkstyle.

More deprecations and remove GraphLegacyStatsNullModule.

* Revert GRAPH_VERSION.
* Fix JavaDocs warnings
* Fix `MBeanExporterParserTests`

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

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2019 the original author or authors.
+ * Copyright 2002-2020 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.
@@ -21,7 +21,6 @@ import java.util.Deque;
 import java.util.List;
 
 import org.springframework.integration.channel.ExecutorChannelInterceptorAware;
-import org.springframework.integration.support.management.PollableChannelManagement;
 import org.springframework.integration.support.management.metrics.CounterFacade;
 import org.springframework.integration.support.management.metrics.MetricsCaptor;
 import org.springframework.jms.core.JmsTemplate;
@@ -39,8 +38,10 @@ import org.springframework.messaging.support.ExecutorChannelInterceptor;
  *
  * @since 2.0
  */
+@SuppressWarnings("deprecation")
 public class PollableJmsChannel extends AbstractJmsChannel
-		implements PollableChannel, PollableChannelManagement, ExecutorChannelInterceptorAware {
+		implements PollableChannel, org.springframework.integration.support.management.PollableChannelManagement,
+		ExecutorChannelInterceptorAware {
 
 	private String messageSelector;
 
@@ -56,21 +57,45 @@ public class PollableJmsChannel extends AbstractJmsChannel
 		this.messageSelector = messageSelector;
 	}
 
+	/**
+	 * Deprecated.
+	 * @return receive count
+	 * @deprecated in favor of Micrometer metrics.
+	 */
+	@Deprecated
 	@Override
 	public int getReceiveCount() {
 		return getMetrics().getReceiveCount();
 	}
 
+	/**
+	 * Deprecated.
+	 * @return receive count
+	 * @deprecated in favor of Micrometer metrics.
+	 */
+	@Deprecated
 	@Override
 	public long getReceiveCountLong() {
 		return getMetrics().getReceiveCountLong();
 	}
 
+	/**
+	 * Deprecated.
+	 * @return receive error count
+	 * @deprecated in favor of Micrometer metrics.
+	 */
+	@Deprecated
 	@Override
 	public int getReceiveErrorCount() {
 		return getMetrics().getReceiveErrorCount();
 	}
 
+	/**
+	 * Deprecated.
+	 * @return receive error count
+	 * @deprecated in favor of Micrometer metrics.
+	 */
+	@Deprecated
 	@Override
 	public long getReceiveErrorCountLong() {
 		return getMetrics().getReceiveErrorCountLong();