Migration 92: truncate slug
Migration 92: truncate slug

The fixture had some values that could cause an overflow in certains RBDMS like
MySQL in strict mode.

artefactual/archivematica-fpr-admin,artefactual/archivematica-fpr-admin,artefactual/archivematica-fpr-admin,artefactual/archivematica-fpr-admin