get_running_builds can't handle job url with prefix

[Sunjoo Park]

:Details:
In 'get_running_builds' method on __init__.py , this line try to parse
a running build url and extract a job name from it.

m = re.match(r'/job/([^/]+)/.*', urlparse(url).path)

But this code can't handle a job url containing a prefix
(generated when using --prefix option with Jenkisn war file )