* Added default credentials for all deployments.
* Added Dummy.openstack scenario that allows running
openstack contexts with dummy scenario.
* Removed openstack users context from samples and jobs
where it was not required.
Co-Authored-By: Anton Studenov <astudenov@mirantis.com>
Change-Id: I851f2c71e4db25bef17e25c143275e75b16595bf