graphics/geoserver: Update version 2.16.2=>2.17.0

• Add LICENSE for all the libraries that is being used in the project APACHE20 BSD2CLAUSE EPL GPLv2 GPLv3 MIT
• All LICENSE involvements are discussed in ${WRKSRC}/NOTICE.md

Relnotes: http://blog.geoserver.org/2020/04/21/geoserver-2-17-0-released/