#189 päivän kysymys give user way to handle no-winner-set exception:

Now if user gives a daily question but they have no answer to the last dq, bot gives more informative message. User is directed to mark their answer message as answer with '/vastaus' command.
Now when message is marked with '/vastaus' command, a check is made. If author of the message that was replied with the '/vastaus' command is the same telegram user that gave the next daily question after that answer,, the answer is marked as winning one straight away and user is informed of that.
Extracted common test chat sequence to static function and created test case for marking users message as answer after bot has informed that setting winner has failed

M4R774 / bobweb2