/usr/share/gosa/plugins/ is in gosa-plugin-samba 2.7.4+reloaded2-9ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/gosa/plugins/admin/
/usr/share/gosa/plugins/admin/systems/
/usr/share/gosa/plugins/admin/systems/samba/
/usr/share/gosa/plugins/admin/systems/samba/class_winGeneric.inc
/usr/share/gosa/plugins/admin/systems/samba/migration/
/usr/share/gosa/plugins/admin/systems/samba/migration/class_migrate_sambaMachineAccountRDN.inc
/usr/share/gosa/plugins/admin/systems/samba/tabs_winstation.inc
/usr/share/gosa/plugins/admin/systems/samba/wingeneric.tpl
/usr/share/gosa/plugins/personal/
/usr/share/gosa/plugins/personal/samba/
/usr/share/gosa/plugins/personal/samba/class_sambaAccount.inc
/usr/share/gosa/plugins/personal/samba/class_sambaLogonHours.inc
/usr/share/gosa/plugins/personal/samba/class_sambaMungedDial.inc
/usr/share/gosa/plugins/personal/samba/samba3.tpl
/usr/share/gosa/plugins/personal/samba/sambaLogonHours.tpl