Fix Sonar errors: public data members in classes

Change-Id: I7aca37d5553436167ac6e7b2206392f88bddc118
diff --git a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java
index fe33f6c..e73a0d8 100644
--- a/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java
+++ b/apps/segmentrouting/src/main/java/org/onosproject/segmentrouting/grouphandler/DefaultGroupHandler.java
@@ -126,9 +126,9 @@
                     + " Skipping value assignment in DefaultGroupHandler");
         }
         this.flowObjectiveService = flowObjService;
-        this.nsNextObjStore = srManager.nsNextObjStore;
-        this.vlanNextObjStore = srManager.vlanNextObjStore;
-        this.portNextObjStore = srManager.portNextObjStore;
+        this.nsNextObjStore = srManager.nsNextObjStore();
+        this.vlanNextObjStore = srManager.vlanNextObjStore();
+        this.portNextObjStore = srManager.portNextObjStore();
         this.srManager = srManager;
 
         populateNeighborMaps();