store display-name on insert

[ArtificialOwl]

this is missing on insert, as it is already on update:

files_lock/lib/Db/LocksRequest.php

Lines 70 to 73 in ded15ac

	->set('user_id', $qb->createNamedParameter($lock->getOwner()))
	->set('owner', $qb->createNamedParameter($lock->getDisplayName()))
	->set('scope', $qb->createNamedParameter($lock->getScope()))
	->where($qb->expr()->eq('id', $qb->createNamedParameter($lock->getId())));

[juliusknorr]

Thanks, let me close this as I've included the change in here in #391 with already resolved conflicts