Updated CHANGELOG.md for release 1.66.0
Updated CHANGELOG.md for release 1.66.0

jonvestal/open-kilda,jonvestal/open-kilda,telstra/open-kilda,telstra/open-kilda,telstra/open-kilda,telstra/open-kilda,telstra/open-kilda,telstra/open-kilda,jonvestal/open-kilda,jonvestal/open-kilda,telstra/open-kilda,jonvestal/open-kilda