Vocabs: add vocab-specific soft 404 page so as to omit RDA-specific stuff
Vocabs: add vocab-specific soft 404 page so as to omit RDA-specific stuff

The RDA soft 404 page includes (via a template) other gunk
that we don't need, and that doesn't work (without including more
JS). So add a vocabs-specific copy that imports the vocab template.

au-research/ANDS-Registry-Core,au-research/ANDS-Registry-Core,au-research/ANDS-Registry-Core,au-research/ANDS-Registry-Core,au-research/ANDS-Registry-Core