SmbClient might not close all connection and therefore PacketReader thread kept running

[JozefDropco]

Hi,
we came across issue where PacketReader thread kept running in background even though all interactions was already closed. I found out that its because connection.close method is called #SmbClient is calling close method without force. If the connection is pooled multiple times SmbClient.close() will cause only decrease of the pooled count which is wrong.

I will provide a fix shortly for this.