Add policy forwarding for next hop match and GUE encapsulation action

* Import oc-types module before using it.

release/models/policy-forwarding/openconfig-pf-forwarding-policies.yang

@@ -7,6 +7,7 @@ submodule openconfig-pf-forwarding-policies {
   import openconfig-packet-match { prefix "oc-pmatch"; }
   import openconfig-yang-types { prefix "oc-yang"; }
   import openconfig-inet-types { prefix "oc-inet"; }
+  import openconfig-types { prefix oc-types; }
 
   include openconfig-pf-path-groups;