Merge pull request #3684 from oswaldoacauan/refactor-api-users

.../api/meetings/server/handlers/permissionSettingsChange.js

...l5/imports/api/meetings/server/modifiers/clearMeetings.js

...l5/imports/api/meetings/server/modifiers/removeMeeting.js

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

bigbluebutton-html5/imports/api/phone/server/getStun.js

...html5/imports/api/phone/server/modifiers/eventHandlers.js

...luebutton-html5/imports/api/users/server/eventHandlers.js

...on-html5/imports/api/users/server/handlers/emojiStatus.js

...utton-html5/imports/api/users/server/handlers/getUsers.js

...-html5/imports/api/users/server/handlers/listeningOnly.js

...5/imports/api/users/server/handlers/lockedStatusChange.js

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

...ton-html5/imports/api/users/server/handlers/removeUser.js

...ton-html5/imports/api/users/server/handlers/userJoined.js

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

...on-html5/imports/api/users/server/handlers/voiceUpdate.js

bigbluebutton-html5/imports/api/users/server/index.js

bigbluebutton-html5/imports/api/users/server/methods.js

...html5/imports/api/users/server/methods/assignPresenter.js

...button-html5/imports/api/users/server/methods/kickUser.js