Adding failure paths for all async tests

This will ensure the tests fail if the intended path isn't followed

spec/parser/javascript/escape_spec.js

@@ -63,7 +63,7 @@ describe('parser/javascript/escape.js', function() {
             rx: '3',
             ry: '3'
           }));
-        })
+        }, fail)
         .finally(done)
         .done();
     });