Move remaining time from meeting collection to meetingRecordingTime collection

bigbluebutton-html5/imports/api/meetings/index.js

...ports/api/meetings/server/handlers/timeRemainingUpdate.js

...luebutton-html5/imports/api/meetings/server/publishers.js

...ml5/imports/ui/components/notifications-bar/container.jsx

...n-html5/imports/ui/components/subscriptions/component.jsx