[Installation script] GitLab 6.x - CentOS 6.5 minimal

When following the recipe I noticed that the "sudo -u git -H bundle exec rake gitlab:setup RAILS_ENV=production" command failed with the following notice: "CREATE EXTENSION" failed. Extensions are only available starting version 9.1. while the installation script makes use of PostgreSQL version 8.4 that is available in the CentOS 6.5 repository. 

I managed to complete the installation using version 9.3.