Set up a dev-app-alias apphost so we can check aliases are working correctly

[jvperrin]

Currently in our apphosting vhosts, we have dev-app.ocf.berkeley.edu set up, but it has no aliases (unlike the web testing vhosts, which do have aliases, for instance dev-vhost-alias.ocf.berkeley.edu). It would be nice to have an alias created so that we can test that aliases are still being parsed and loaded by ocflib correctly and test using them on server upgrades.

I've put this in this repo since I'm moving vhost config here (#108) but this could go in ocf/projects or something instead.