issue #2395: Scale9Sprite's default anchor point is center now.
issue #2395: Removing unused codes in ActionTest.h.
closed #2395: Adding Scale9SpriteTest for TestCpp
issue #2395: Adding Scale9SpriteTest for other platforms.
issue #2395: [Win32] Updating TestCpp project configuration
issue #2395: Updating TestCpp/Android.mk
Merge branch 'iss2395-s9sprite-test' of https://github.com/dumganhar/cocos2d-x into iss2395-s9sprite-test
Merge pull request #3129 from dumganhar/iss2395-s9sprite-test

closed 2395: Adding Scale9SpriteTest for TestCpp
Minor fix of PR 3128.