Added unit tests to Apache.NMS.MSMQ and subsequenly fixed a few bugs

[Stéphane Ramet]

Hi,

I just submitted a patch as AMQNET-556
<https://issues.apache.org/jira/browse/AMQNET-556> adding unit tests to
Apache.NMS.MSMQ and subsequenly fixed a few bugs.

Regards,

Stéphane Ramet