This task is to update fcrepo4 logic to filter out what is exposed to the user as "fedora:mimeType".
Currently, after running the following steps, "fedora:mimeType" still exists:
- Start a 4.2.0 fcrepo and add a binary resource
- Run the fcrepo4-upgrade-utility over that repository
- Start master branch of fcrepo => see fedora:mimeType still exists