This patch makes use of the osbash public and private keys to ssh to VM
rather than the vagrant keys.
This also removes the vagrant keys directory from the repository.
Change-Id: I939274f188a02469c7e2cf9f9502510ea00d514e
This changeset adds README.rst files to several subdirectories
to explain their content and purpose.
Partial-Bug: 1312764
Implements: blueprint openstack-training-labs
Change-Id: Ibba6a68d104b2aade412a06d63ed49467fb2bba3