Fix T45176: FBX import - mismatch in camera rotation (bad rotation order).

Somehow our mapping from FBX int 'enum' code to string representation of rotation order
was pure nonsense, only giving correct result for default 'XYZ'.

Note that we fallback to EulerXYZ in case of 'SphericXYZ', not even sure what this is!

Conflicts:
	io_scene_fbx/__init__.py