Disable the "gem update --system" step in all-in-one package process until we can figure out why it does not work in the CI
Disable the "gem update --system" step in all-in-one package process until we can figure out why it does not work in the CI

git-svn-id: d8f3215415546ce936cf3b822120ca56e5ebeaa0@1395757 13f79535-47bb-0310-9956-ffa450edef68

liamchristopher/buildr,jpcaruana/buildr,apache/buildr,jpcaruana/buildr,apache/buildr,stewi2/buildr,apache/buildr,liamchristopher/buildr,stewi2/buildr,jpcaruana/buildr,jpcaruana/buildr,stewi2/buildr,liamchristopher/buildr,liamchristopher/buildr,stewi2/buildr,apache/buildr