ssl certs - configure CA for wmfusercontent.org

in Ibbe0a4f209422a4 this new cert and the CA cert
were added. but we were missing the config in certs.pp
that actually tell puppet they belong together.
puppet will need this to create a "chained" version
of the file, by concatenating the cert and the CA cert

Change-Id: If5c41db7ca6bc952a33ce0784058d155505c4b1f
Merge "ssl certs - configure CA for wmfusercontent.org" into production