Try fixing Timer bug

Change-Id: I044c0f5c8eb9874b4508da216a827c86fdd8b436

@@ -13,7 +13,6 @@ import java.util.Collections;
 import java.util.List;
 import java.util.Set;
 
-import org.junit.Ignore;
 import org.junit.Test;
 import org.onlab.onos.net.ConnectPoint;
 import org.onlab.onos.net.Device;
@@ -82,7 +81,6 @@ public class HostMonitorTest {
     }
 
     @Test
-    @Ignore
     public void testMonitorHostDoesNotExist() throws Exception {
         HostManager hostManager = createMock(HostManager.class);
 

@@ -28,8 +28,9 @@ public final class Timer {
 
     private static synchronized  void initTimer() {
         if (Timer.timer == null) {
-            Timer.timer = new HashedWheelTimer();
-            Timer.timer.start();
+            HashedWheelTimer hwTimer = new HashedWheelTimer();
+            hwTimer.start();
+            Timer.timer = hwTimer;
         }
     }