Fix to use "." to source script files
Fix to use "." to source script files

Adhering to coding conventions. Refer to ``Code conventions`` at
https://docs.openstack.org/contributor-guide/ for details.

Change-Id: I01a66baf06c1f4358b2b09eab7782c05ed0ab4cb

openstack/openstack-doc-tools,openstack/openstack-doc-tools