closed #4763: 1.fix stopalleffect lead to stop background music 2.fix play effect may lead to memory leak
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
Small fix in Lua test.
Merge pull request #6251 from dumganhar/develop

Small fix in Lua test.
Memory leak fix for ClippingNode
Memory leak fix in macro IMPLEMENT_CLASS_INFO
Memory leak fix in SchedulerTest
GroupCommandManager should not be a singleton, it should be managed by Renderer.
Fix incompatible pointer conversion
Add support for orientation change callback (applicationScreenSizeChanged) in Android Java activity.
Merge pull request #6265 from sachingarg05/AndroidJavaActivityOrientation

Fix Orientation Change Support for Android Java Activity
[ci skip]
Merge pull request #6256 from dumganhar/scheudlertest-leak

Memory leak fix in SchedulerTest
Add interface setCullingEnabled(), culling is disabled by default
Const love: std::function<void(Texture2D*)> -> const
std::function<void(Texture2D*)>&
Merge branch 'develop' of https://github.com/natural-law/cocos2d-x; branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
Merge pull request #6266 from dumganhar/develop

Const love: std::function<void(Texture2D*)> -> const std::function<void(Texture2D*)>&
Merge pull request #6255 from dumganhar/cocostudio-leak

Memory leak fix in macro IMPLEMENT_CLASS_INFO
Merge pull request #6254 from dumganhar/clippingnode-leak

Memory leak fix for ClippingNode