Fixes Riak 2.0 on various clouds, adds prelim work for Docker
Fixes for subnetHostname in Riak for Clocker
Make operating system name lowercase for Riak URL
This closes #292

* github/pr/292:
  Make operating system name lowercase for Riak URL
  Fixes for subnetHostname in Riak for Clocker
  Fixes Riak 2.0 on various clouds, adds prelim work for Docker