Ugly fix to get rid of "\u" in the error raised by WinRMTransportError

[zdtsw]

'Got error :
winrm.exceptions.WinRMTransportError: (u'http', u'Bad HTTP response returned from server. Code 403')

[coveralls]

Coverage remained the same at 67.857% when pulling 63a7bbb on zdtsw:formatting into b1a54bc on diyan:master.

[badcure]

If you don't mind, I will close this out since it has been a while.

If you still would like to fix the messaging, I think implementing the __str__ for the exceptions themselves. It would be better overall to format it when converting the Exception to a string, rather than format it in each location it is raised.