convert images to basic platform images, not STI specific

centos-ruby and centos-ruby2 provide a basic image that can assemble code (by running the prepare script) and run code (via the run script) if the user bind-mounts source in on run.  (for ruby 19 and 20 respectively)

centos-ruby-builder demonstrates an auto-executing image that will prepare and then switch to a default mode of run, again assuming source is bind-mounted in.

wildfly is just a basic image that contains/starts wildfly, and includes maven.