Merge topic 'CFFbugfixeHexahedron'

3060c67e Add the catch for error and format
ff35086f Fix for the same issue with Fluent Legacy Format.
eac1c665 Fixes for a bug when reading hexahedron tree cell structure.

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: buildbot <buildbot@kitware.com>
Reviewed-by: Mathieu Westphal (Kitware) <mathieu.westphal@kitware.com>
Merge-request: !11829