Merge topic 'vtkPLYReader_RGBA_scalar_array_fix'

2d2993db Fix RGBA color scalar array name in vtkPLYReader

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Merge-request: !11944