/usr/share/gosa/plugins/ is in gosa-plugin-systems 2.7.4+reloaded2-1+deb8u2.
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/class_componentGeneric.inc
/usr/share/gosa/plugins/admin/systems/class_filterOPSIHOSTS.inc
/usr/share/gosa/plugins/admin/systems/class_filterSYSTEMS.inc
/usr/share/gosa/plugins/admin/systems/class_filterServerService.inc
/usr/share/gosa/plugins/admin/systems/class_servGeneric.inc
/usr/share/gosa/plugins/admin/systems/class_serverService.inc
/usr/share/gosa/plugins/admin/systems/class_systemManagement.inc
/usr/share/gosa/plugins/admin/systems/class_termDNS.inc
/usr/share/gosa/plugins/admin/systems/component.tpl
/usr/share/gosa/plugins/admin/systems/contents.tpl
/usr/share/gosa/plugins/admin/systems/main.inc
/usr/share/gosa/plugins/admin/systems/migration/
/usr/share/gosa/plugins/admin/systems/migration/class_migrate_componentRDN.inc
/usr/share/gosa/plugins/admin/systems/migration/class_migrate_serverRDN.inc
/usr/share/gosa/plugins/admin/systems/migration/class_migrate_systemRDN.inc
/usr/share/gosa/plugins/admin/systems/network.tpl
/usr/share/gosa/plugins/admin/systems/password.tpl
/usr/share/gosa/plugins/admin/systems/paste_generic.tpl
/usr/share/gosa/plugins/admin/systems/server.tpl
/usr/share/gosa/plugins/admin/systems/serverService-filter.xml
/usr/share/gosa/plugins/admin/systems/serverService-list.tpl
/usr/share/gosa/plugins/admin/systems/serverService-list.xml
/usr/share/gosa/plugins/admin/systems/services/
/usr/share/gosa/plugins/admin/systems/services/class_goService.inc
/usr/share/gosa/plugins/admin/systems/system-filter.xml
/usr/share/gosa/plugins/admin/systems/system-list.tpl
/usr/share/gosa/plugins/admin/systems/system-list.xml
/usr/share/gosa/plugins/admin/systems/systemSelect/
/usr/share/gosa/plugins/admin/systems/systemSelect/class_systemSelect.inc
/usr/share/gosa/plugins/admin/systems/systemSelect/selectSystem-filter.xml
/usr/share/gosa/plugins/admin/systems/systemSelect/selectSystem-list.tpl
/usr/share/gosa/plugins/admin/systems/systemSelect/selectSystem-list.xml
/usr/share/gosa/plugins/admin/systems/tabs_arpnewdevice.inc
/usr/share/gosa/plugins/admin/systems/tabs_component.inc
/usr/share/gosa/plugins/admin/systems/tabs_server.inc