HDF Filter: Do not delete complete rows

adapt filter in HDF generation to write FillValue instead of deleting all entries of the observation

changed milestone to %Version 1.4

assigned to @benedikt.loew

created branch 63-hdf-filter-do-not-delete-complete-rows to address this issue

mentioned in merge request !43 (merged)

mentioned in commit 843e8920

mentioned in commit 5b7b0dac

closed