Add machine_image spec to Rakefile for CI
Add machine_image spec to Rakefile for CI

redterror/chef-provisioning-aws,msonnabaum/chef-provisioning-aws,chef/chef-provisioning-aws,miguelcnf/chef-provisioning-aws,getaroom/chef-provisioning-aws,Mindera/chef-provisioning-aws,chef/chef-provisioning-aws