Use diamond operator

Change-Id: I9bb7e90ce7f45e65b4081a5bf85570b97e44712e
diff --git a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
index cf48dcb..97333eb 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/group/impl/DistributedGroupStore.java
@@ -131,8 +131,7 @@
     private ExecutorService messageHandlingExecutor;
     private static final int MESSAGE_HANDLER_THREAD_POOL_SIZE = 1;
 
-    private final HashMap<DeviceId, Boolean> deviceAuditStatus =
-            new HashMap<DeviceId, Boolean>();
+    private final HashMap<DeviceId, Boolean> deviceAuditStatus = new HashMap<>();
 
     private final AtomicInteger groupIdGen = new AtomicInteger();
 
@@ -685,8 +684,7 @@
                                                    UpdateType type,
                                                    GroupBuckets buckets) {
         GroupBuckets oldBuckets = oldGroup.buckets();
-        List<GroupBucket> newBucketList = new ArrayList<GroupBucket>(
-                oldBuckets.buckets());
+        List<GroupBucket> newBucketList = new ArrayList<>(oldBuckets.buckets());
         boolean groupDescUpdated = false;
 
         if (type == UpdateType.ADD) {