BibHarvest: removed trailing '/' in /oai2d baseurl
BibHarvest: removed trailing '/' in /oai2d baseurl

* Removed trailing `/' in /oai2d baseurl so that OAI gateway valides.

inveniosoftware/invenio,tiborsimko/invenio,inveniosoftware/invenio,tiborsimko/invenio