install the bug-attachment.wm.org cert on kaulen

without this SSL cert restarting Apache on kaulen
would have failed. it has been added to the config
and the cert appears in the repo, yet it hasn't been
installed via puppet

RT #5011

Change-Id: I22ad7f159b2188a995e816527a2ab060280803f3
Merge "install the bug-attachment.wm.org cert on kaulen" into production