Add in some magic to auto install RVM when needed so that the ci jobs can run on nodes other than ubuntu2
Add in some magic to auto install RVM when needed so that the ci jobs can run on nodes other than ubuntu2

git-svn-id: d8f3215415546ce936cf3b822120ca56e5ebeaa0@1394890 13f79535-47bb-0310-9956-ffa450edef68

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