Extra GET on creation fails with Backbone 0.9.9+ (master)

Backbone 0.9.9 and newer are executing callbacks with its own
arguments rather than these passed by jQuery.ajax callbacks.

It did not work for me with the most recent Backbone from master branch. Most probably Backbone.sync callbacks "success" and "error" are executed with its own arguments (model, response, options) etc rather than these passed by jQuery callbacks.

I think it might be the case because when I updated backbone, and backbone-relational to these that I am using the tests simply broke.

Tests are broken anyway in this commit - they have wrong assumptions now.

It works for my case perfectly, anyway I think this problem needs to be confirmed.