Run tests of all target programs we have.
The patch enables required services in devstack (environment
the tests are executed on in Zuul) and implements a logic when
share config options which can be discovered only by using admin
credentials are passed to the second tempestconf execution
(with demo creds) so that they are set in tempest.conf used to run
refstack-client.
Change-Id: I79b7611f47d7d67d439e24c2427ee59870732172
f448d8c15d