The SCM module doesn't handle network outages gracefully

[jeremycline]

The SCM module doesn't handle network outages gracefully, nor does it document that it might raise a requests exception:

content = fedmsg.meta.msg2long_form(msg, **self.config) or u''
File "/usr/lib/python2.7/site-packages/fedmsg/meta/__init__.py", line 142, in __wrapper
return f(msg, **config)
File "/usr/lib/python2.7/site-packages/fedmsg/meta/__init__.py", line 161, in __wrapper
return f(msg, processor=processor, **config)
File "/usr/lib/python2.7/site-packages/fedmsg/meta/__init__.py", line 247, in msg2long_form
result = processor.long_form(msg, **config)
File "/usr/lib/python2.7/site-packages/fedmsg_meta_fedora_infrastructure/scm.py", line 67, in long_form
response = requests.get(url.format(repo=repo, rev=rev))
File "/usr/lib/python2.7/site-packages/requests/api.py", line 68, in get
return request('get', url, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/api.py", line 50, in request
response = session.request(method=method, url=url, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 464, in request
resp = self.send(prep, **send_kwargs)
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 602, in send
history = [resp for resp in gen] if allow_redirects else []
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 195, in resolve_redirects
allow_redirects=False,
File "/usr/lib/python2.7/site-packages/requests/sessions.py", line 576, in send
r = adapter.send(request, **kwargs)
File "/usr/lib/python2.7/site-packages/requests/adapters.py", line 415, in send
raise ConnectionError(err, request=request)
requests.exceptions.ConnectionError: ('Connection aborted.', error(110, 'Connection timed out'))