[maven-release-plugin] prepare release ghprb-1.30.8
[maven-release-plugin] prepare release ghprb-1.30.8

dulvac/ghprb-plugin,janinko/ghprb,arcadia/ghprb-plugin,dulvac/ghprb-plugin,arcadia/ghprb-plugin,jenkinsci/ghprb-plugin,DavidTanner/ghprb-plugin,ithaka/ghprb-plugin,janinko/ghprb,fbelzunc/ghprb-plugin,ithaka/ghprb-plugin,DavidTanner/ghprb-plugin,fbelzunc/ghprb-plugin,jenkinsci/ghprb-plugin