- remove uesless module_extra_vars, this is a historical issue. In the
  past, we use 'docker exec kolla_toolbox ansible xxx' to run module on
  target node, so complex data have to pass through extra_vars. Now we
  are using kolla_toolbox module, no need to use extra_vars anymore.
- Remove some useless until.

Change-Id: I72ed28001202917f9a82a1c3ea33cd6319911ec8