Modified the previous implementation of the whiteboard individual access to remove
multiple Collections dependency on this feature. Multi-user whiteboard is now an
array instead of a boolean value and most of the access control can be synchronized
and handled by akka-apps.

Adds lastAuthTokenValidatedOn to users in Akka, send it in ValidateAuthTokenRespMsg pubSub msg, makes Meteor store it as authTokenValidatedTime

Removes loginTime creation from Meteor and use the registeredOn date created on Akka. Makes Akka send the registeredOn date throught PubSub messages: UserRegisteredRespMsg, GuestsWaitingForApprovalEvtMsg and ValidateAuthTokenRespMsg.

Added the missing extractCredential method and replaced the old callback strategy
with the new try-catch block.

Improve annotations and cursor streamer logs, also add a type info for some logs in authentication process
and rollback some attempts to fix multiple leaving end call.

Improve logs for a better debug/understanding of problems related to authentication and log in process