[ONOS-6208]Implemention of onos and loxi for OVS NAT and connection tracking support

Change-Id: I782422d41fdacc805b523b57c3bd0b6e67e483a2
diff --git a/core/api/src/main/java/org/onosproject/net/flow/instructions/ExtensionTreatmentType.java b/core/api/src/main/java/org/onosproject/net/flow/instructions/ExtensionTreatmentType.java
index 1371e42..d11a9a9 100644
--- a/core/api/src/main/java/org/onosproject/net/flow/instructions/ExtensionTreatmentType.java
+++ b/core/api/src/main/java/org/onosproject/net/flow/instructions/ExtensionTreatmentType.java
@@ -48,6 +48,9 @@
         NICIRA_RESUBMIT_TABLE(14),
         NICIRA_PUSH_NSH(38),
         NICIRA_POP_NSH(39),
+        NICIRA_CT(40),
+        NICIRA_NAT(41),
+        NICIRA_CT_CLEAR(42),
         OFDPA_SET_VLAN_ID(64),
         OFDPA_SET_MPLS_TYPE(65),
         OFDPA_SET_OVID(66),