Define getSystemValueBool/Int/String function default parameter with correct type
Define getSystemValueBool/Int/String function default parameter with correct type

Signed-off-by: MichaIng <5f726662e7ca541c0aec63efdec81c7c2711727a@dietpi.com>
andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,andreas-p/nextcloud-server,nextcloud/server,nextcloud/server,nextcloud/server,nextcloud/server