Update LICENSE, README.md files

LICENSE

-Copyright 2019 ETSI
+Copyright 2020 ETSI
 
 Redistribution and use in source and binary forms, with or without 
 modification, are permitted provided that the following conditions are met:

README.md

@@ -3,6 +3,8 @@
 This repository contains OpenAPIs for ETSI GS NFV-SOL 009, RESTful protocols 
 specification for the management of NFV-MANO.
 
+**IMPORTANT: In case of discrepancies the published ETSI Group Specification takes precedence.**
+
 More information at [NFV Solutions wiki](https://nfvwiki.etsi.org/index.php?title=NFV_Solutions).
 
 ## How to raise issues
@@ -12,7 +14,7 @@ Please report errors, bugs or other issues [here](https://forge.etsi.org/rep/nfv
 ## How to contribute
 
 ETSI Forge uses Gitlab to manage submissions to the repository. Check the project page [here](https://forge.etsi.org/rep/nfv/SOL009).
-For more information on setting up your environment and contributing, you may refer to the [ETSI Forge wiki](https://forge.etsi.org/wiki/index.php/Main_Page).
+More information is available [here](https://nfvwiki.etsi.org/index.php?title=SOL_OpenAPI_Main_Page#How_to_Contribute).
 
 ## License