fix for http://46.243.183.199:8888/#/project/1/issue/57

Author: VladislavKostyukevich

src/main/java/main/view/Project/TestRunServlet.java

@@ -45,7 +45,7 @@ public void doDelete(HttpServletRequest req, HttpServletResponse resp) {
         try {
             Session session = createSession(req);
             String requestedJson = getRequestJson(req);
-            if(requestedJson == null) {
+            if(requestedJson == null || requestedJson.isEmpty()) {
                 TestRunDto testRun = new TestRunDto();
                 testRun.getSearchTemplateFromRequestParameters(req);
                 session.controllerFactory.getHandler(testRun).delete(testRun);