Fix inTangent in animationGroup
Fix inTangent in animationGroup

Fix this bug report here:
https://forum.babylonjs.com/t/animationgroup-bug/15150
Kesshi/Babylon.js,Kesshi/Babylon.js,NicolasBuecher/Babylon.js,sebavan/Babylon.js,NicolasBuecher/Babylon.js,RaananW/Babylon.js,NicolasBuecher/Babylon.js,RaananW/Babylon.js,BabylonJS/Babylon.js,sebavan/Babylon.js,BabylonJS/Babylon.js,sebavan/Babylon.js,RaananW/Babylon.js,Kesshi/Babylon.js,BabylonJS/Babylon.js