Assigning names to various threads

- specify nearby logger when possible

Change-Id: Ia8925ab1459c4d1da922becd0e201388d44d4294
diff --git a/incubator/store/src/main/java/org/onosproject/incubator/store/resource/impl/DistributedLabelResourceStore.java b/incubator/store/src/main/java/org/onosproject/incubator/store/resource/impl/DistributedLabelResourceStore.java
index fda0d83..3da65ee 100644
--- a/incubator/store/src/main/java/org/onosproject/incubator/store/resource/impl/DistributedLabelResourceStore.java
+++ b/incubator/store/src/main/java/org/onosproject/incubator/store/resource/impl/DistributedLabelResourceStore.java
@@ -120,7 +120,8 @@
         messageHandlingExecutor = Executors
                 .newFixedThreadPool(MESSAGE_HANDLER_THREAD_POOL_SIZE,
                                     groupedThreads("onos/store/flow",
-                                                   "message-handlers"));
+                                                   "message-handlers",
+                                                   log));
         clusterCommunicator
                 .addSubscriber(LabelResourceMessageSubjects.LABEL_POOL_CREATED,
                         SERIALIZER::<LabelResourcePool>decode,