Check if event are already prepared each second (60 seconds max)

Author: gbalykov

src/tests/tracing/eventcounter/runtimecounters.cs

@@ -104,17 +104,19 @@ public static int TestEntryPoint()
             // Create an EventListener.
             using (RuntimeCounterListener myListener = new RuntimeCounterListener())
             {
-                Thread.Sleep(60000);
-                if (myListener.Verify())
+                // Wait max 60 seconds
+                for (int i = 0; i < 60; i++)
                 {
-                    Console.WriteLine("Test passed");
-                    return 100;
-                }
-                else
-                {
-                    Console.WriteLine($"Test Failed - did not see one or more of the expected runtime counters.");
-                    return 1;
+                    Thread.Sleep(1000);
+                    if (myListener.Verify())
+                    {
+                        Console.WriteLine("Test passed");
+                        return 100;
+                    }
                 }
+
+                Console.WriteLine($"Test Failed - did not see one or more of the expected runtime counters.");
+                return 1;
             }
         }
     }