Stop using dockerfile/* images
Stop using dockerfile/* images

As per
http://blog.docker.com/2015/03/updates-available-to-popular-repos-update-your-images/
docker has stopped answering dockerfile/redis and dockerfile/nginx.  Fix all
users in our tree.  Sadly this means a lot of published examples are now broken.

pwittrock/community,kubernetes/community,kubernetes/community,bgrant0607/community,kubernetes/community,bgrant0607/community,pwittrock/community