Fix #4734: Normalize contextPath handling in bitstream download route#4735

hernanhlagos wants to merge 2 commits intoDSpace:mainDSpace/dspace-angular:mainfrom

hernanhlagos:fix/fix-4734-contextpath-download-bitstreamhernanhlagos/dspace-angular:fix/fix-4734-contextpath-download-bitstreamCopy head branch name to clipboard