Use third-party repo for Varnish on Precise
Use third-party repo for Varnish on Precise

Precise only has Varnish 3.0.2 which behaves differently from 3.0.5 in
Trusty. So use a third-party repo to match Trusty.

Normally I'd use puppetlabs-apt to do all of this. But it's too much work to
pull in bundler and librarian-puppet for this project.

alphagov/cdn-acceptance-tests,alphagov/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,alphagov/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,mikepea/cdn-acceptance-tests,alphagov/cdn-acceptance-tests