gitlabhq/gitlabhq — pull request #7495 by polamjag (2014-08-13 17:27:33+00:00)
Title: Use xmlschema date format (ISO 8601) on system hooks timestamp

Official document (http://doc.gitlab.com/ce/api/system_hooks.html) says `created_on` date in system hook json should follow ISO 8601, but it doesn't.

This PR fixes that.