Remove ose-sti-image-builder image from pre-fetch
Remove ose-sti-image-builder image from pre-fetch

2015-Middleware-Keynote/demo-ansible,2015-Middleware-Keynote/demo-ansible,ryanj/demo-ansible,christian-posta/demo-ansible,thoraxe/demo-ansible,detiber/demo-ansible,ryanj/demo-ansible,christian-posta/demo-ansible,detiber/demo-ansible,thoraxe/demo-ansible