Try/catch ResetConnectionAsync (works around #208)

[bnabholz]

When the ConnectionPool is asked for a session, depending on server version, it will attempt to reauthenticate. On occasion the server will close the connection and the next read from the stream will be 0 bytes, causing the connection to fail. This PR wraps ResetConnectionAsync in a try/catch, and if it throws it will fall back to instantiating a new MySqlSession.

I'm not sure if we should be trying to catch only certain exceptions (EndOfStreamException?) and let others bubble up as usual.

[bgrainger]

I'm not sure if we should be trying to catch only certain exceptions (EndOfStreamException?) and let others bubble up as usual.

I generally prefer to catch the specific exception I know I'm handling; however, in this case it seems good to fall back to creating a new session if any kind of IOException or SocketException is thrown.

[bgrainger]

I'm going to update the code I just pushed to only catch EndOfStreamException, IOException, SocketException (same as TryPingAsync); I don't want other programming errors to be masked by this catch handler (as it would dramatically reduce performance by essentially disabling connection pooling).

[bnabholz]

Sounds good to me. Thanks for reviewing and thanks to you and the other contributors for this project!

[bgrainger]

Shipped in 0.26.4; thanks for the contribution!