EndpointRequest should check that the request is to the mgmt context

Fixes gh-15702

spring-boot-samples/spring-boot-sample-actuator-custom-security/src/test/java/sample/actuator/customsecurity/ManagementPortAndPathSampleActuatorApplicationTests.java

@@ -56,6 +56,14 @@ public class ManagementPortAndPathSampleActuatorApplicationTests {
 		assertThat(entity.getBody()).contains("Hello World");
 	}
 
+	@Test
+	public void actuatorPathOnMainPortShouldNotMatch() {
+		ResponseEntity<String> entity = new TestRestTemplate().getForEntity(
+				"http://localhost:" + this.port + "/actuator/health",
+				String.class);
+		assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.UNAUTHORIZED);
+	}
+
 	@Test
 	public void testSecureActuator() {
 		ResponseEntity<String> entity = new TestRestTemplate().getForEntity(