Update spec to use rspec ~> 2.1.0
Update spec to use rspec ~> 2.1.0

git-svn-id: d8f3215415546ce936cf3b822120ca56e5ebeaa0@1039834 13f79535-47bb-0310-9956-ffa450edef68

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