USBMON devices in Port Group (how can I get rid of these?

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Just start up Ostinato 
2. Open Ports and Streams PortGroup 0
3. Numerous "usbmon1, usbmon2 ...etc" devices listed as ports

What is the expected output? 
I expected to just see my Ethernet ports (which are listed).

What do you see instead?  But now I have numerous entries (Port 3: usbmon1 , 
Port4: usbmon2 ...etc) listed along with my true ethernet ports


What version and revision of the product are you using (available in the
About dialog)? On what operating system?
I'm running Ostinato 0.5.1 on a Centos 6.5 Linux system.  (I previously used 
OpenSuse - and wouldn't have these extra "usbmon" entries).

I figure this is a Centos thing - but haven't figured out how to get rid of 
these from the Ports list (and I don't want to disable all the USB ports on my 
system).


Please provide any additional information below.

Original issue reported on code.google.com by whoehenr...@gmail.com on 1 May 2014 at 11:02