Use dianmond operator

Change-Id: I551dd9443b10ef17832f74a554486b7605e9866a
diff --git a/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultEdgeGroupHandler.java b/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultEdgeGroupHandler.java
index 41cf8ac..3dc312d 100644
--- a/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultEdgeGroupHandler.java
+++ b/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultEdgeGroupHandler.java
@@ -69,7 +69,7 @@
         Set<Set<DeviceId>> powerSet = getPowerSetOfNeighbors(neighbors);
         log.trace("createGroupsAtEdgeRouter: The size of neighbor powerset "
                 + "for sw {} is {}", deviceId, powerSet.size());
-        Set<NeighborSet> nsSet = new HashSet<NeighborSet>();
+        Set<NeighborSet> nsSet = new HashSet<>();
         for (Set<DeviceId> combo : powerSet) {
             if (combo.isEmpty()) {
                 continue;
@@ -148,7 +148,7 @@
                                             Set<DeviceId> updatedNeighbors) {
         Set<Set<DeviceId>> powerSet = getPowerSetOfNeighbors(updatedNeighbors);
 
-        Set<DeviceId> tmp = new HashSet<DeviceId>();
+        Set<DeviceId> tmp = new HashSet<>();
         tmp.addAll(updatedNeighbors);
         tmp.remove(impactedNeighbor);
         Set<Set<DeviceId>> tmpPowerSet = getPowerSetOfNeighbors(tmp);
@@ -156,7 +156,7 @@
         // Compute the impacted neighbor sets
         powerSet.removeAll(tmpPowerSet);
 
-        Set<NeighborSet> nsSet = new HashSet<NeighborSet>();
+        Set<NeighborSet> nsSet = new HashSet<>();
         for (Set<DeviceId> combo : powerSet) {
             if (combo.isEmpty()) {
                 continue;