fixed sonar isue in UpdateNetworkNotification.java

fixed sonar issue as detailed in SO-956

Issue-ID: SO-956
Change-Id: Ibd7ea95c996bf6119abf2aca9990d2c42bb01ecd
Signed-off-by: Sandeep J <sandeejh@in.ibm.com>
diff --git a/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/network/async/client/UpdateNetworkNotification.java b/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/network/async/client/UpdateNetworkNotification.java
index f61d0a8..daff548 100644
--- a/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/network/async/client/UpdateNetworkNotification.java
+++ b/adapters/mso-openstack-adapters/src/main/java/org/onap/so/adapters/network/async/client/UpdateNetworkNotification.java
@@ -4,6 +4,8 @@
  * ================================================================================
  * Copyright (C) 2017 AT&T Intellectual Property. All rights reserved.
  * ================================================================================
+ * Modifications Copyright (C) 2018 IBM.
+ * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
@@ -292,7 +294,7 @@
          */
         public List<UpdateNetworkNotification.SubnetIdMap.Entry> getEntry() {
             if (entry == null) {
-                entry = new ArrayList<UpdateNetworkNotification.SubnetIdMap.Entry>();
+                entry = new ArrayList<>();
             }
             return this.entry;
         }