Use dianmond operator

Change-Id: I551dd9443b10ef17832f74a554486b7605e9866a
diff --git a/apps/test/distributed-primitives/src/main/java/org/onosproject/distributedprimitives/cli/SetTestGetCommand.java b/apps/test/distributed-primitives/src/main/java/org/onosproject/distributedprimitives/cli/SetTestGetCommand.java
index 0877e6f..fb36a06 100644
--- a/apps/test/distributed-primitives/src/main/java/org/onosproject/distributedprimitives/cli/SetTestGetCommand.java
+++ b/apps/test/distributed-primitives/src/main/java/org/onosproject/distributedprimitives/cli/SetTestGetCommand.java
@@ -49,7 +49,7 @@
     String[] values = null;
 
     Set<String> set;
-    Set<String> toCheck = new HashSet<String>();
+    Set<String> toCheck = new HashSet<>();
     String output = "";
 
     Serializer serializer = Serializer.using(