Added link for DSpace transfer indexing.
Added link for DSpace transfer indexing.

refs #5005

Added a microservice chain link to index DSpace transfer files so they can
be sent to the backlog if desired.

artefactual/archivematica,eckardm/archivematica,michal-ruzicka/archivematica,michal-ruzicka/archivematica,eckardm/archivematica,eckardm/archivematica,artefactual/archivematica,sevein/archivematica,sevein/archivematica,michal-ruzicka/archivematica,eckardm/archivematica,sevein/archivematica,sevein/archivematica,artefactual/archivematica,michal-ruzicka/archivematica,artefactual/archivematica