drop metadata configs; use userdata configs for autoSwap

...orts/api/users-settings/server/methods/addUserSettings.js

bigbluebutton-html5/imports/startup/client/auth.js

...luebutton-html5/imports/ui/components/media/container.jsx

bigbluebutton-html5/imports/ui/components/media/service.js

bigbluebutton-html5/private/config/settings.yml