In 246721e a change was made to add a
timeout to various `urllib2` requests. However, in this module `urllib`
is used rather than `urllib2`. Unfortunately, the third argument to
`urllib.urlopen` is `proxies`
(https://docs.python.org/2/library/urllib.html#urllib.urlopen) rather
than `timeout`, as in `urllib2`
(https://docs.python.org/2/library/urllib2.html#urllib2.urlopen).

This was therefore causing the following exception:

```
Traceback (most recent call last):
  File "/usr/lib64/ganglia/python_modules/httpd.py", line 77, in update_stats
    f = urllib.urlopen(STATUS_URL, None, 2)
  File "/usr/lib64/python2.7/urllib.py", line 80, in urlopen
    opener = FancyURLopener(proxies=proxies)
  File "/usr/lib64/python2.7/urllib.py", line 614, in __init__
    URLopener.__init__(self, *args, **kwargs)
  File "/usr/lib64/python2.7/urllib.py", line 132, in __init__
    assert hasattr(proxies, 'has_key'), "proxies must be a mapping"
AssertionError: proxies must be a mapping
Exception AttributeError: "FancyURLopener instance has no attribute 'tempcache'" in <bound method FancyURLopener.__del__ of <urllib.FancyURLopener instance at 0x2133170>> ignored
```

A fix is to change this module to use `urllib2` so this works as
expected.

Switch to urllib2 to prevent exception