Add Ralph/roc to users

It's my birthday. Please give me the inimitable present of access to the ci new box so I can investigate a failed build (https://ci-new.alphagov.co.uk/job/performanceplatform_backdrop/1098/console)

![](http://25.media.tumblr.com/d7932ac84cfa02fa43d51dd6ca14b885/tumblr_myyj9xiops1qam8b5o2_500.png)

![](http://24.media.tumblr.com/364484ee97c39e3f0a98effecff666e3/tumblr_myyj9xiops1qam8b5o1_500.jpg)