netcdf: support older HDF5 API

Our build sets the default API to 1.8 which confuses the simple checks in netcdf.

requested review from @ryan.krattiger1

Errors:

• commit 3297025b cannot be merged; it is marked as a work-in-progress (WIP).

Please rewrite commits to fix the errors listed above (adding fixup commits will not resolve the errors) and force-push the branch again to update the merge request.

Do: merge

mentioned in commit a166a037

merged manually

mentioned in commit bob.obara/cmb-superbuild@37431a73

mentioned in commit ben.boeckel/paraview-superbuild@5c523a19

mentioned in merge request paraview-superbuild!1240 (merged)