Apply exclusion rules to child contributors

Update `IncludeExcludeGroupMemberPredicate` so that exclusion rules are
also applied to child contributors. The restores the behavior of Spring
Boot 2.5.x where `management.endpoint.health.group.mygroup.exclude=db`
would exclude 'db/one', 'db/two' etc.

Fixes gh-29251

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/health/IncludeExcludeGroupMemberPredicate.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -41,10 +41,7 @@ class IncludeExcludeGroupMemberPredicate implements Predicate<String> {
 
 	@Override
 	public boolean test(String name) {
-		return testCleanName(clean(name));
-	}
-
-	private boolean testCleanName(String name) {
+		name = clean(name);
 		return isIncluded(name) && !isExcluded(name);
 	}
 
@@ -64,7 +61,18 @@ class IncludeExcludeGroupMemberPredicate implements Predicate<String> {
 	}
 
 	private boolean isExcluded(String name) {
-		return this.exclude.contains("*") || this.exclude.contains(name);
+		return this.exclude.contains("*") || isExcludedName(name);
+	}
+
+	private boolean isExcludedName(String name) {
+		if (this.exclude.contains(name)) {
+			return true;
+		}
+		if (name.contains("/")) {
+			String parent = name.substring(0, name.lastIndexOf("/"));
+			return isExcludedName(parent);
+		}
+		return false;
 	}
 
 	private Set<String> clean(Set<String> names) {

spring-boot-project/spring-boot-actuator-autoconfigure/src/test/java/org/springframework/boot/actuate/autoconfigure/health/IncludeExcludeGroupMemberPredicateTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2021 the original author or authors.
+ * Copyright 2012-2022 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.
@@ -112,6 +112,12 @@ class IncludeExcludeGroupMemberPredicateTests {
 		assertThat(predicate).accepts("test/a").rejects("test/b").rejects("foo");
 	}
 
+	@Test // gh-29251
+	void specifiedExcludeShouldExcludeNestedChildren() {
+		Predicate<String> predicate = include("*").exclude("test");
+		assertThat(predicate).rejects("test").rejects("test/a").rejects("test/a").accepts("other");
+	}
+
 	private Builder include(String... include) {
 		return new Builder(include);
 	}