Add missing Sink to MeterManager.

Without this patch no events are generated.
Also checkstyle fix.

Change-Id: I4df7992e6e4dc6c0829ebeff7ee4a9cc16b36be1
diff --git a/incubator/net/src/main/java/org/onosproject/incubator/net/meter/impl/MeterManager.java b/incubator/net/src/main/java/org/onosproject/incubator/net/meter/impl/MeterManager.java
index dfbbd16..2cf658f 100644
--- a/incubator/net/src/main/java/org/onosproject/incubator/net/meter/impl/MeterManager.java
+++ b/incubator/net/src/main/java/org/onosproject/incubator/net/meter/impl/MeterManager.java
@@ -83,9 +83,9 @@
     public void activate() {
 
         store.setDelegate(delegate);
+        eventDispatcher.addSink(MeterEvent.class, listenerRegistry);
 
-        onComplete = (request, result, error) ->
-            {
+        onComplete = (request, result, error) -> {
                 request.context().ifPresent(c -> {
                     if (error != null) {
                         c.onError(request, MeterFailReason.UNKNOWN);