Refactor Lab Section

Adds basic skeleton/structure with stubs. Changes are done as per Roger
Luethi's scripts. These changes are done to incorporate various features
like logging, multi-os setup etc. These scripts may also target more
virtualization products like KVM, LXC down the roadmap.

blueprint openstack-training-labs

Change-Id: I0bb33b518080f8a9b9c0e1624f43a66337eb8278