Updated changelog for release 1.43.0
Updated changelog for release 1.43.0

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