Update log-a-bug comments
Update log-a-bug comments

Enhance comments for conf.py. Remove now obsolete variable pwd.

Co-Authored-By: Bernd Bausch <9496117409ac92595f1f92215fa4324cfccacee7@gmail.com>
Change-Id: If339d286437547a2d319cc0a270d97ef39d69784

openstack/openstackdocstheme,openstack/openstackdocstheme,vauxoo-tests/vauxoodocstheme,vauxoo-tests/vauxoodocstheme,vauxoo-tests/vauxoodocstheme,openstack/openstackdocstheme,openstack/openstackdocstheme