metomi/rose#934: different default metadata for different file types
metomi/rose#934: update
metomi/rose#934: remove awkward function
Merge branch 'master' into 934.rose-macro-filter-metadata-all
metomi/rose#934: add test
Merge pull request #978 from benfitzpatrick/934.rose-macro-filter-metadata-all

#934: different default metadata for different file types