Fix mngmt dependency for MetricsCaptor

The `IntegrationManagementConfigurer` is a `BeanPostProcessor`
so it must not have direct dependency injection for other beans.
In our case it is a `MetricsCaptor` injected from the
`IntegrationManagementConfiguration`

* Fix `IntegrationManagementConfiguration` and `IntegrationManagementConfigurer`
to rely on the `ObjectProvider<MetricsCaptor>` instead

Tested against latest Spring Boot

**Cherry-pick to `5.3.x` & `5.2.x`**

# Conflicts:
#	spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationManagementConfiguration.java
#	spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationManagementConfigurer.java

Author: artembilan

spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationManagementConfiguration.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2015-2019 the original author or authors.
+ * Copyright 2015-2020 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.
@@ -70,14 +70,13 @@ public void setImportMetadata(AnnotationMetadata importMetadata) {
 	@Bean(name = IntegrationManagementConfigurer.MANAGEMENT_CONFIGURER_NAME)
 	@Role(BeanDefinition.ROLE_INFRASTRUCTURE)
 	public IntegrationManagementConfigurer managementConfigurer(ObjectProvider<MetricsCaptor> metricsCaptorProvider) {
-
 		IntegrationManagementConfigurer configurer = new IntegrationManagementConfigurer();
 		setupCountsEnabledNamePatterns(configurer);
 		setupStatsEnabledNamePatterns(configurer);
 		configurer.setDefaultLoggingEnabled(
 				Boolean.parseBoolean(this.environment.resolvePlaceholders(
 						(String) this.attributes.get("defaultLoggingEnabled"))));
-		configurer.setMetricsCaptor(metricsCaptorProvider.getIfUnique());
+		configurer.setMetricsCaptorProvider(metricsCaptorProvider);
 		configurer.setDefaultCountsEnabled(
 				Boolean.parseBoolean(this.environment.resolvePlaceholders(
 						(String) this.attributes.get("defaultCountsEnabled"))));

spring-integration-core/src/main/java/org/springframework/integration/config/IntegrationManagementConfigurer.java

@@ -28,6 +28,7 @@
 
 import org.springframework.beans.BeansException;
 import org.springframework.beans.factory.BeanNameAware;
+import org.springframework.beans.factory.ObjectProvider;
 import org.springframework.beans.factory.SmartInitializingSingleton;
 import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
 import org.springframework.context.ApplicationContext;
@@ -105,6 +106,8 @@ public class IntegrationManagementConfigurer
 
 	private MetricsCaptor metricsCaptor;
 
+	private ObjectProvider<MetricsCaptor> metricsCaptorProvider;
+
 	@Override
 	public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
 		this.applicationContext = applicationContext;
@@ -251,12 +254,24 @@ public void setMetricsCaptor(@Nullable MetricsCaptor metricsCaptor) {
 		this.metricsCaptor = metricsCaptor;
 	}
 
+	void setMetricsCaptorProvider(ObjectProvider<MetricsCaptor> metricsCaptorProvider) {
+		this.metricsCaptorProvider = metricsCaptorProvider;
+	}
+
+	@Nullable
+	MetricsCaptor obtainMetricsCaptor() {
+		if (this.metricsCaptor == null && this.metricsCaptorProvider != null) {
+			this.metricsCaptor = this.metricsCaptorProvider.getIfUnique();
+		}
+		return this.metricsCaptor;
+	}
+
 	@Override
 	public void afterSingletonsInstantiated() {
 		Assert.state(this.applicationContext != null, "'applicationContext' must not be null");
 		Assert.state(MANAGEMENT_CONFIGURER_NAME.equals(this.beanName), getClass().getSimpleName()
 				+ " bean name must be " + MANAGEMENT_CONFIGURER_NAME);
-		if (this.metricsCaptor != null) {
+		if (obtainMetricsCaptor() != null) {
 			injectCaptor();
 			registerComponentGauges();
 		}
@@ -305,7 +320,7 @@ private void injectCaptor() {
 	@Override
 	public Object postProcessAfterInitialization(Object bean, String name) throws BeansException {
 		if (this.singletonsInstantiated) {
-			if (this.metricsCaptor != null && bean instanceof IntegrationManagement) {
+			if (obtainMetricsCaptor() != null && bean instanceof IntegrationManagement) {
 				((IntegrationManagement) bean).registerMetricsCaptor(this.metricsCaptor);
 			}
 			return doConfigureMetrics(bean, name);