Fix flakiness of live metrics test

Author: jeanbisutti

smoke-tests/apps/LiveMetrics/src/main/java/com/microsoft/applicationinsights/smoketestapp/HealthCheckServlet.java

@@ -0,0 +1,17 @@
+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+package com.microsoft.applicationinsights.smoketestapp;
+
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+// this is used by the test infra in order to know when it's ok to start running the tests
+@WebServlet("")
+public class HealthCheckServlet extends HttpServlet {
+
+  @Override
+  protected void doGet(HttpServletRequest request, HttpServletResponse response) {}
+}

smoke-tests/apps/LiveMetrics/src/main/java/com/microsoft/applicationinsights/smoketestapp/TestServlet.java

@@ -13,7 +13,7 @@
 import org.apache.log4j.LogManager;
 import org.apache.log4j.Logger;
 
-@WebServlet("/*")
+@WebServlet("/test")
 public class TestServlet extends HttpServlet {
 
   private static final Logger logger = LogManager.getLogger("smoketestapp-livemetrics");