Bump to CR3 snapshot and change groupID to io.vertx
Add TODO for test cleanup
https://github.com/vert-x/mod-lang-rhino/commit/ab555c05a2252d09be42201dfea20cb0b358ef76
https://github.com/vert-x/mod-lang-rhino/commit/989f64299930e4b089afe89059ae27de9fdc88df