As part of the Pike goals we are moving api services to run as WSGI
apps. cinder-api service is set up as a wsgi app, and this patch moves
it over.
Since this is just a drop in replacement for the existing eventlet
service, operators an deployers should notice no difference.
Change-Id: I0283722d6da56201aa0894089c36168ad426700c
Implements: blueprint goal-deploy-api-in-wsgi