Fix bug setup for security-doc

Bugs for the security-doc repo are tracked with openstack-manuals. Add
the group so that we Closes-Bug for security-doc works.

Also, changes get published directly, so set direct-release.

Change-Id: I68d42591157f3c1da50baf6e17ee2a801f2e6fdf
Merge "Fix bug setup for security-doc"