[IMP] web test runner: pass execute's arguments to the function to avoid duplication

bzr revid: xmo@openerp.com-20121116072906-0di2j83p602a2l9i

addons/web/static/src/js/testing.js

@@ -347,7 +347,7 @@ openerp.testing = {};
             stop();
             var timeout;
             case_stack.execute(function () {
-                var result = callback(instance, $fixture, mock);
+                var result = callback.apply(null, arguments);
                 if (!(result && _.isFunction(result.then))) {
                     if (async) {
                         ok(false, "asynchronous test cases must return a promise");