replace setInterval with setTimeout in datasource.coffee

[Valentin Zberea]

Right now the expired collections are collected every 10 seconds by checkForUnusedCollections method:

setInterval(@checkForUnusedCollections, @checkIntervalForUnusedCollections)

In order to make tests run faster I would like to be able to override checkIntervalForUnusedCollections property. This would be achieved by replacing setInterval with setTimeout and schedule another callback at the end of checkForUnusedCollections method.

@uberVU/mozaic-core-commiters

[Andrei-Adnan Ismail]

You can make time pass faster with Sinon :) It has a "fast forward" feature.