Add ruby_parser gem for all environments.
What does this MR do?
Makes the ruby_parser
gem available in production too.
Are there points in the code the reviewer needs to double check?
Why was this MR needed?
We need to run the rake gettext:pack
command as part of the Omnibus configuration, given Omnibus doesn't install any gems for from the test or development groups that command was failing in Omnibus.