Closed #4866: Fixed a bug of cc.Scale9Sprite that its CascadeColor and CascadeOpacity are invalid.
Fixed #4866: remove the test code.
Merge pull request #1781 from dingpinglv/Iss4866_Scale9Sprite

Closed #4866: Fixed a bug of cc.Scale9Sprite that its CascadeColor and CascadeOpacity are invalid.