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
Changes missed when fixing Riak hostname and URL