Order endpoint properties alphabetically

Closes gh-46227

Author: philwebb

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/endpoint/jackson/JacksonEndpointAutoConfiguration.java

@@ -17,6 +17,7 @@
 package org.springframework.boot.actuate.autoconfigure.endpoint.jackson;
 
 import com.fasterxml.jackson.annotation.JsonInclude.Include;
+import com.fasterxml.jackson.databind.MapperFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
 
@@ -43,6 +44,7 @@ public class JacksonEndpointAutoConfiguration {
 	@ConditionalOnClass({ ObjectMapper.class, Jackson2ObjectMapperBuilder.class })
 	public EndpointObjectMapper endpointObjectMapper() {
 		ObjectMapper objectMapper = Jackson2ObjectMapperBuilder.json()
+			.featuresToEnable(MapperFeature.SORT_PROPERTIES_ALPHABETICALLY)
 			.featuresToDisable(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS,
 					SerializationFeature.WRITE_DURATIONS_AS_TIMESTAMPS)
 			.serializationInclusion(Include.NON_NULL)

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-actuator/src/test/java/smoketest/actuator/AbstractManagementPortAndPathSampleActuatorApplicationTests.java

@@ -67,7 +67,7 @@ void testHealth() {
 		ResponseEntity<String> entity = new TestRestTemplate().withBasicAuth("user", "password")
 			.getForEntity("http://localhost:" + this.managementPort + "/admin/health", String.class);
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
-		assertThat(entity.getBody()).isEqualTo("{\"status\":\"UP\",\"groups\":[\"comp\",\"live\",\"ready\"]}");
+		assertThat(entity.getBody()).isEqualTo("{\"groups\":[\"comp\",\"live\",\"ready\"],\"status\":\"UP\"}");
 	}
 
 	@Test
@@ -76,7 +76,7 @@ void testGroupWithComposite() {
 			.getForEntity("http://localhost:" + this.managementPort + "/admin/health/comp", String.class);
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
 		assertThat(entity.getBody()).contains(
-				"components\":{\"a\":{\"status\":\"UP\",\"details\":{\"hello\":\"spring-a\"}},\"c\":{\"status\":\"UP\",\"details\":{\"hello\":\"spring-c\"}}");
+				"components\":{\"a\":{\"details\":{\"hello\":\"spring-a\"},\"status\":\"UP\"},\"c\":{\"details\":{\"hello\":\"spring-c\"},\"status\":\"UP\"}}");
 	}
 
 	@Test