Merge topic 'const-madness3'

f5990f63 Made some vtkInformation / vtkCollection API VTK_FUTURE_CONST
4b70e9d5 Made some vtkArray API VTK_FUTURE_CONST
905b3bcc Made some vtkObjectFactory methods VTK_FUTURE_CONST
a8581979 Made some vtkCollection APIs VTK_FUTURE_CONST
f4717220 Made some vtkBox APIs VTK_FUTURE_CONST
5ac78849 Made several Get*Position methods VTK_FUTURE_CONST
2cfb30cb RequiresExplicitFaceRepresentation, IsLinear, IsExplicitCell VTK_FUTURE_CONST
6e1e72d9 Made IsPrimaryCell VTK_FUTURE_CONST
...

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Acked-by: Ben Boeckel <ben.boeckel@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Merge-request: !10497