Adds a link to the Debian wiki

This patch adds a link to http://wiki.debian.org/OpenStack,
so that users know how to report bugs to the Debian BTS.
It also adds (Wheezy) to the Debian 7.0 titles.

Change-Id: I258f562314be49668f9fb921296c415be644e32b
backport: havana
Merge "Adds a link to the Debian wiki"