Revert massive and unnecessary test changes

This reverts most of commits ae8658f01a31fbc330655078a218f884724b3784, c3fdc1794cf8fa021da985870c877c31cc068853, 54d33a876e2bcf5259313a80125e2350f042e495, and e2cedc1c2228db8c97df0ac1f1abe666ce3a05e1.
Update ODI content models version

So that we don't need to make test changes
Don't include patchlevel in ruby specifier
Merge pull request #6 from theodi/feature-roll-back-test-changes

Roll back test changes
No ruby patchlevel, individual gemset
Delete .ruby-version
Add dotenv support
Update gds-sso
Add foreman config
Merge pull request #7 from theodi/feature-deploy-support

Deploy support
Remove production env from Procfile
Use port from foreman
Merge branch 'master' of github.com:theodi/panopticon into feature-add-tags