use openstackdocstheme html context
use openstackdocstheme html context

Set some of the new config values and enable openstackdocstheme as an
extension so it will inject values into the page context as it writes
each documentation page. This ensures the pages link to the right bug
tracker, etc.

Change-Id: Id9cc61e81aa43f4b69883d338090716005477d0a
Signed-off-by: Doug Hellmann <0798ebecfb7bc4dfb9d0445c2fa030eb64e1fa1c@doughellmann.com>

dtroyer/python-openstacksdk,openstack/os-client-config,openstack/python-openstacksdk,dtroyer/os-client-config,stackforge/python-openstacksdk,dtroyer/python-openstacksdk,openstack/python-openstacksdk,stackforge/python-openstacksdk