Code cleanup: Simplify tests util functions that passes assert as a parameter

[rxaviers]

Ref: https://github.com/jquery/globalize/pull/351/files#r21450909

---

util.assertParameterPresence( assert, "currency", function() {
  Globalize.currencyFormatter();
});

@jzaefferer

I brought this up before, might be worth another try. Can this be changed to the below?

assert.parameterPresence( "currency", ... );

The same applies to any other calls that pass assert as a parameter

@rxaviers

Sorry if I missed it. But, I don't remember such comment. If you say it's better overloading assert, it shall be. Will be tracked as a separate issue #359