Rework the gpg addon to remove the need to set the GPG_USER environment variable unless invoking the upload task
Rework the gpg addon to remove the need to set the GPG_USER environment variable unless invoking the upload task

git-svn-id: d8f3215415546ce936cf3b822120ca56e5ebeaa0@1422474 13f79535-47bb-0310-9956-ffa450edef68

stewi2/buildr,apache/buildr,jpcaruana/buildr,mariusk/buildr-kawa,liamchristopher/buildr,stewi2/buildr,liamchristopher/buildr,stewi2/buildr,liamchristopher/buildr,stewi2/buildr,mariusk/buildr-kawa,apache/buildr,apache/buildr,jpcaruana/buildr,liamchristopher/buildr,jpcaruana/buildr,apache/buildr,mariusk/buildr-kawa,jpcaruana/buildr