[SONA] Add a configuration to choose the SNATing mechanism between OVS SNAT and Controller SNAT.

Change-Id: Idd82a7c2e0d220d52e5445b3ca1d166663cf3b4a
diff --git a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/api/Constants.java b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/api/Constants.java
index bcd31d0..a24a85e 100644
--- a/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/api/Constants.java
+++ b/apps/openstacknetworking/src/main/java/org/onosproject/openstacknetworking/api/Constants.java
@@ -34,7 +34,7 @@
     public static final int PRIORITY_TUNNEL_TAG_RULE = 30000;
     public static final int PRIORITY_FLOATING_INTERNAL = 42000;
     public static final int PRIORITY_FLOATING_EXTERNAL = 41000;
-    public static final int PRIORITY_OVS_SNAT_RULE = 40500;
+    public static final int PRIORITY_STATEFUL_SNAT_RULE = 40500;
     public static final int PRIORITY_ICMP_RULE = 43000;
     public static final int PRIORITY_INTERNAL_ROUTING_RULE = 28000;
     public static final int PRIORITY_EXTERNAL_ROUTING_RULE = 25000;