Merge "Allow duplicated name and use Actor ID as a unique key to define animation...

diff --cc automated-tests/src/dali-scene3d/utc-Dali-Gltf2Loader.cpp
Simple merge

diff --cc dali-scene3d/public-api/loader/gltf2-loader.cpp
Simple merge

diff --cc dali-scene3d/public-api/loader/node-definition.cpp
Simple merge