Add some diagnostics to see where the devappserver has gotten to.

Author: briandealwis

plugins/com.google.cloud.tools.eclipse.integration.appengine/src/com/google/cloud/tools/eclipse/integration/appengine/DebugNativeAppEngineStandardProjectTest.java

@@ -116,6 +116,8 @@ public void run() {
     SwtBotTestingUtilities.waitUntilStyledTextContains(bot,
         "Dev App Server is now running", consoleContents);
 
+    System.out.printf("---- Dev App Server ----\n%s\n------------------\n",
+        consoleContents.getText());
     assertEquals("Hello App Engine!",
         getUrlContents(new URL("http://localhost:8080/hello"), (int) SWTBotPreferences.TIMEOUT));