fix(rackspace): use beta heat file
fix(rackspace): use beta heat file

wli6/docs,hkjn/docs-1,mischief/coreos-docs,ionave/docs,skynet/docs,iankronquist/docs,michelleN/docs,atxwebs/docs,jdloft/docs,endocode/coreos-docs,robszumski/docs,coreos/docs,joshix/docs,jonboulle/docs,bq-xiao/docs,marineam/coreos-docs,ksmaheshkumar/docs-2,mjg59/docs