Try fixing flaky test.

Signed-off-by: Olga Maciaszek-Sharma <olga.maciaszek-sharma@broadcom.com>

spring-cloud-netflix-eureka-server/src/test/java/org/springframework/cloud/netflix/eureka/server/EurekaInstanceMonitorTests.java

@@ -30,6 +30,7 @@
 import org.springframework.boot.test.context.SpringBootTest;
 import org.springframework.cloud.netflix.eureka.server.metrics.EurekaInstanceMonitor;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.web.bind.annotation.RestController;
 
 import static java.util.concurrent.TimeUnit.MILLISECONDS;
 import static java.util.concurrent.TimeUnit.SECONDS;
@@ -170,6 +171,7 @@ private void assertEurekaInstance(Map<Tags, Long> meterRegistryCounts) {
 	@Configuration(proxyBeanMethods = false)
 	@EnableAutoConfiguration
 	@EnableEurekaServer
+	@RestController
 	protected static class Application {
 
 	}