They dropped the cloudkitty-api command line[0], so we should add wsgi
support for cloudkitty-api.
[0]https://review.openstack.org/#/c/366043/
Change-Id: Ie34d4f2d5c303bbd7ac09a8ab9e8d9bdc763c57b
Closes-Bug: #1713879
(cherry picked from commit 2fca630cdb)