Barbican is being enabled, as such the metadata field should not be
modified by Pegleg. If it says encrypted, then Barbican will
encrypt.
If it says cleartext, Barbican won't. All pegleg needs to do is
decrypt the document prior to bundling it which exists already
without this change.
This reverts commit 2d88f48989031442f8bdae5221f7359948ebd10d.
Change-Id: I8900f910f9816508a8ec5c23932252bb9d1fde09
85fdcd497a