Remove unnecessary boxing.

Change-Id: I788a044ba8a52ab16ea5f312fde862e8a0612e34
diff --git a/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/GroupStatsCollector.java b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/GroupStatsCollector.java
index 7366806..374cfc5 100644
--- a/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/GroupStatsCollector.java
+++ b/providers/openflow/group/src/main/java/org/onosproject/provider/of/group/impl/GroupStatsCollector.java
@@ -79,14 +79,14 @@
         if (!sw.isConnected()) {
             return;
         }
-        Long statsXid = OpenFlowGroupProvider.getXidAndAdd(2);
+        long statsXid = OpenFlowGroupProvider.getXidAndAdd(2);
         OFGroupStatsRequest statsRequest = sw.factory().buildGroupStatsRequest()
                 .setGroup(OFGroup.ALL)
                 .setXid(statsXid)
                 .build();
         sw.sendMsg(statsRequest);
 
-        Long descXid = statsXid + 1;
+        long descXid = statsXid + 1;
         OFGroupDescStatsRequest descStatsRequest =
                 sw.factory().buildGroupDescStatsRequest()
                         .setXid(descXid)