Order metrics auto-configurations correctly

Update metrics auto-configurations so that they are auto-configured
after `CompositeMeterRegistryAutoConfiguration` in order to ensure
the `MeterRegistry` bean has been defined.

Prior to this commit, metrics auto-configurations that depended on a
`MeterRegistry` has `@AutoConfigureAfter(MetricsAutoConfiguration.class)`
which is not sufficient since `MetricsAutoConfiguration` does not export
a `MeterRegistry`.

See gh-21134

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/JvmMetricsAutoConfiguration.java

@@ -37,7 +37,7 @@ import org.springframework.context.annotation.Configuration;
  * @since 2.1.0
  */
 @Configuration(proxyBeanMethods = false)
-@AutoConfigureAfter(MetricsAutoConfiguration.class)
+@AutoConfigureAfter(CompositeMeterRegistryAutoConfiguration.class)
 @ConditionalOnClass(MeterRegistry.class)
 @ConditionalOnBean(MeterRegistry.class)
 public class JvmMetricsAutoConfiguration {

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/KafkaMetricsAutoConfiguration.java

@@ -39,7 +39,7 @@ import org.springframework.context.annotation.Configuration;
  * @since 2.1.0
  */
 @Configuration(proxyBeanMethods = false)
-@AutoConfigureAfter({ MetricsAutoConfiguration.class, JmxAutoConfiguration.class })
+@AutoConfigureAfter({ CompositeMeterRegistryAutoConfiguration.class, JmxAutoConfiguration.class })
 @ConditionalOnClass({ KafkaConsumerMetrics.class, KafkaConsumer.class })
 @ConditionalOnBean(MeterRegistry.class)
 public class KafkaMetricsAutoConfiguration {

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/Log4J2MetricsAutoConfiguration.java

@@ -41,7 +41,7 @@ import org.springframework.core.type.AnnotatedTypeMetadata;
  * @since 2.1.0
  */
 @Configuration(proxyBeanMethods = false)
-@AutoConfigureAfter(MetricsAutoConfiguration.class)
+@AutoConfigureAfter(CompositeMeterRegistryAutoConfiguration.class)
 @ConditionalOnClass(value = { Log4j2Metrics.class, LogManager.class },
 		name = "org.apache.logging.log4j.core.LoggerContext")
 @ConditionalOnBean(MeterRegistry.class)

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/LogbackMetricsAutoConfiguration.java

@@ -44,7 +44,7 @@ import org.springframework.core.type.AnnotatedTypeMetadata;
  * @since 2.1.0
  */
 @Configuration(proxyBeanMethods = false)
-@AutoConfigureAfter(MetricsAutoConfiguration.class)
+@AutoConfigureAfter(CompositeMeterRegistryAutoConfiguration.class)
 @ConditionalOnClass({ MeterRegistry.class, LoggerContext.class, LoggerFactory.class })
 @ConditionalOnBean(MeterRegistry.class)
 @Conditional(LogbackLoggingCondition.class)

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/metrics/SystemMetricsAutoConfiguration.java

@@ -36,7 +36,7 @@ import org.springframework.context.annotation.Configuration;
  * @since 2.1.0
  */
 @Configuration(proxyBeanMethods = false)
-@AutoConfigureAfter(MetricsAutoConfiguration.class)
+@AutoConfigureAfter(CompositeMeterRegistryAutoConfiguration.class)
 @ConditionalOnClass(MeterRegistry.class)
 @ConditionalOnBean(MeterRegistry.class)
 public class SystemMetricsAutoConfiguration {