heroku/heroku-pipeline — pull request #15 by jonsharratt (2014-10-23 14:59:11+00:00)
Title: Switch to use multi json

We are currently experiencing the error below:

```
-- heroku pipeline:promote -a app-name
! Heroku client internal error.
! Search for help at: https://help.heroku.com
! Or report a bug at: https://github.com/heroku/heroku/issues/new

Error: uninitialized constant Heroku::OkJson (NameError)
Backtrace: /home/ubuntu/.heroku/plugins/heroku-pipeline/lib/heroku/cisaurus/cisaurus.rb:14:in `block in downstreams'
/home/ubuntu/.heroku/plugins/heroku-pipeline/lib/heroku/cisaurus/cisaurus.rb:68:in `call'
/home/ubuntu/.heroku/plugins/heroku-pipeline/lib/heroku/cisaurus/cisaurus.rb:68:in `handle_error'
/home/ubuntu/.heroku/plugins/heroku-pipeline/lib/heroku/cisaurus/cisaurus.rb:13:in `downstreams'
/home/ubuntu/.heroku/plugins/heroku-pipeline/lib/heroku/command/pipeline.rb:85:in `promote'
/usr/local/heroku/lib/heroku/command.rb:217:in `run'
/usr/local/heroku/lib/heroku/cli.rb:38:in `start'
/usr/local/heroku/bin/heroku:74:in `

'

Command: heroku pipeline:promote -a app-name
Plugins: heroku-pipeline
Version: heroku-toolbelt/3.14.0 (x86_64-linux) ruby/2.1.2
```

This is to switch out `OkJson` to `MultiJson` instead due to the latest changes within the Heroku toolbelt recently at:
https://github.com/heroku/heroku/commit/6dadf8a967ebf3736c1aed1886ebad03be6ee60a