Fix token verification error in Load Balance Settings page

Fixes #2298

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Don't create admin-ssc and admin-dbsc tokens unnecessarily

Centralise them into prepareDBSettingContext and prepareServerSettingsContext

Signed-off-by: Shitiz Garg <mail@dragooon.net>
Merge pull request #2408 from Dragooon/release-2.1

Token fixes