Move /application to /actuator

Change the endpoint default path from `/application` to `/actuator`.

Fixes gh-10970

spring-boot-samples/spring-boot-sample-jersey/src/test/java/sample/jersey/SampleJerseyApplicationTests.java

@@ -60,8 +60,8 @@ public class SampleJerseyApplicationTests {
 
 	@Test
 	public void actuatorStatus() {
-		ResponseEntity<String> entity = this.restTemplate
-				.getForEntity("/application/health", String.class);
+		ResponseEntity<String> entity = this.restTemplate.getForEntity("/actuator/health",
+				String.class);
 		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
 		assertThat(entity.getBody()).isEqualTo("{\"status\":\"UP\"}");
 	}