"Fix root motion initial rotation handling" commit breaks root motion completely

Enabling and processing root motion causes animation to rotate the wrong direction. Roll instead of Yaw. Pitch instead of roll etc.

This error does not occur in UE 4.6.

[Download mesh and anim sample][1]

Import PreviewMesh.fbx as skeletal mesh, creating new skeleton

Import the other fbx files as animations using that skeleton

For each imported animation:

Open the animation asset in persona

Notice the direction the animation is moving/rotating

In the Anim Details panel, enable root motion

The animation should be in-place now

Under Show, check 'Process Root Motion'

Notice that the direction it's applying Root Motion is completely wrong compared to step 2.

Reverting lines 783 and 784 in that commit to what they were originally, fixes the problem.