Adds a configuration option and capability to automatically
record the lessee for a deployment based upon the original
auth_token information provided in the request context.
Additional token information is now shared through the context
which is extended in the same fashion as most other projects
saving request token information to their RequestContext,
instead of triggering excess API calls in the background to
Keystone to try and figure out requestor's information.
Change-Id: I42a2ceb9d2e7dfdc575eb37ed773a1bc682cec23
c3f397149a