If no Metadata-Relevant header is provided the server assumes that it is FALSE

http://swordapp.github.io/SWORDv2-Profile/SWORDProfile.html#protocoloperations_editingcontent_binary:
The client can replace the existing content of a resource by performing an HTTP PUT of some new binary content to the EM-IRI

-->If no Metadata-Relevant header is provided the server MAY assume that it is true and MAY attempt to extract metadata from the deposit. If Metadata-Relevant is false the server SHOULD NOT attempt to extract metadata from the deposit.

ISSUE: If no Metdata-Relevant header is provided, the server assumes that it is FALSE instead of TRUE