Refs #60 - Add method to get request content as array and remove setting of content property.
Refs #60 - Update controllers to use getContentAsArray().
Refs #60 - Fix undefined variable error.
Refs #60 - Use helper method.
Merge pull request #60 from synapsestudios/feature/60-do-not-set-content-property-on-rest-controller

Don't set `content` property on rest controller in execute