Split Meteor roles backend-frontend revisit

.../org/bigbluebutton/core2/FromAkkaAppsMsgSenderActor.scala

...mports/api/meetings/server/handlers/meetingDestruction.js

...html5/imports/api/meetings/server/modifiers/addMeeting.js

.../imports/api/meetings/server/modifiers/meetingHasEnded.js

...l5/imports/api/users/server/handlers/validateAuthToken.js

...utton-html5/imports/api/users/server/store/bannedUsers.js

bigbluebutton-html5/imports/startup/server/index.js

bigbluebutton-html5/imports/startup/server/redis.js

bigbluebutton-html5/package.json

bigbluebutton-html5/private/config/settings.yml