move "content" arrays in each service to an external JSON file

[thescientist13]

it would be a bit more easier to manage and reuse "raw" data in services and unit tests if the data itself was self contained to its own file.

So create a data/ directory and export all the arrays into their own files. unit tests can then reuse this raw data, and will also help make sure they stay in sync with what's actually happening in the app.