dn2ocname: also apply group filter to readAttribute()
dn2ocname: also apply group filter to readAttribute()

Signed-off-by: Roland Tapken <0d270388f2f92757a5de0f4bd891d3b392c44c4f@bitarbeiter.net>

nextcloud/server,andreas-p/nextcloud-server,nextcloud/server,nextcloud/server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server,andreas-p/nextcloud-server