Auto generate and check config sample
Auto generate and check config sample

It uses config sample generator code and scripts for check that config
is uptodate from oslo.

Change-Id: I60e50c1b27e16616b34b7f97a61bf65b4ecbce76

openstack/sahara-tests,esikachev/sahara-tests,esikachev/sahara-tests,openstack/sahara-tests,openstack/sahara-scenario,esikachev/sahara-tests,openstack/sahara-tests,openstack/sahara-scenario,openstack/sahara-tests,openstack/sahara-scenario