Reintegrate jfryman/puppet-nginx#331 (upstream exports/collections)
- resurrecting jfryman/puppet-nginx#331 from @rainopik
- update (concat/stdlib) dependency version requirements based on current usage
- fix upstream tests to work with rainopik's changes in what was jfryman/puppet-nginx#331
Merge pull request #347 from rabbitt/feature/upstream-exports

Reintegrate jfryman/puppet-nginx#331 (upstream exports/collections)