In trying to get scripts/srf to work I needed to set subprocess.Popen to

In trying to get scripts/srf to work I needed to set subprocess.Popen to
shell=True, the end result of that is that at least on linux hosts
passing in a list of arguments to Popen doesn't work very well, Popen
needs a string.

Perhaps a better solution would be for queuecommand to take a
shell parameter and if that's true do the joining into a string.

but for the moment I just converted my test case to pass a string
instead of a list.