A NotFoundException was mistakenly thrown when the Session was set to
null via Socket.IO. Additionally, the user count was sent before it
had been updated.

Closes GH-13.

Added few pp Attributes to SessionInfo. Requests for Public Pool Sessions now return SessionInfo instead of Session.

Closes GH-12.

Closes GH-11.

#14448

databaseDao. Task #14478

count to NewAnswerEvent websocket broadcast. Task #14471