Convert Faking/Failing mechanism to new Configuration value

Converted Bamboo faking mechanism away from parsing out the GET param… …
…s into using a new Configuration value: addFakeRequest and addFailRequest.

Lots of changes to the tests to use the new format.

Also 117:
![giphy](https://cloud.githubusercontent.com/assets/695943/5072707/2508163a-6e74-11e4-9641-9103f9b9fda9.gif)

Does it need `!== false`? Seems `findMatchingFeed` requires to fixture to work for that feed.