deposit: thesis collection correction

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
deposit: url mapping correction

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
deposit: degree type empty value addition

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>
deposit: exclusive fields by document type cleaning

Signed-off-by: Pedro Gaudêncio <pedro.gaudencio@cern.ch>