Remove "datacenter" related changes and improvements in the compute and storage
drivers. Some of those changes are backward incompatible and are still work in
progress. They will be included in the next major release.


git-svn-id: https://svn.apache.org/repos/asf/libcloud/branches/0.12.x@1439028 13f79535-47bb-0310-9956-ffa450edef68