Fix inbound ESL reconnection authentication status

[adrien-martin]

On reconnect Client's method canSend() can return true before authentication is performed.
This can not happen at the first connection because authenticated is false by default.

[RomanValov]

I would recommend resetting all the authentication status variables like.
At least authenticatorResponsded is checked against it's value:

authenticatorResponded.set(false);
authenticated = false;
authenticationResponse = null;