MAAS uses two different model fields to store binary data

[Raphaël Badin]

MAAS uses two different Binary fields: src/metadataserver/fields.py:BinaryField (that one was created before Django had a BinaryField) and Django's BinaryField (BootSource uses that one). Having two different ways to accomplish the same thing leads to duplicated code down the line, in the API/form code for instance and is thus an unnecessary maintenance burden.

We should probably normalize using Django's BinaryField across the board.