[SONA] Enable connection tracking only when security group is enabled

Change-Id: Ia5731c8c878c48c53e7397bf51687dd31c9b839f
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSecurityGroupManager.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSecurityGroupManager.java
index 2e5891d..f6a4de7 100644
--- a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSecurityGroupManager.java
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/impl/OpenstackSecurityGroupManager.java
@@ -70,6 +70,8 @@
     private static final String ERR_NOT_FOUND = "not found";
     private static final String ERR_DUPLICATE = "already exist";
 
+    private boolean useSecurityGroup = false;
+
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
     protected CoreService coreService;
 
@@ -189,6 +191,16 @@
     }
 
     @Override
+    public boolean isSecurityGroupEnabled() {
+        return useSecurityGroup;
+    }
+
+    @Override
+    public void setSecurityGroupEnabled(boolean option) {
+        useSecurityGroup = option;
+    }
+
+    @Override
     public void clear() {
         osSecurityGroupStore.clear();
     }