Catch ORPort socket timeouts

Oops. I added a timeout attribute but completely forgot to catch the resulting
exceptions. Caught thanks to starlight...

  https://trac.torproject.org/projects/tor/ticket/28961

  Traceback (most recent call last):
    File "../download_descriptor.py", line 133, in <module>
      main()
    File "../download_descriptor.py", line 115, in main
      endpoints = [args.download_from],
    File "/usr/local/lib/python3.7/site-packages/stem/descriptor/remote.py", line 485, in run
      return list(self._run(suppress))
    File "/usr/local/lib/python3.7/site-packages/stem/descriptor/remote.py", line 496, in _run
      raise self.error
    File "/usr/local/lib/python3.7/site-packages/stem/descriptor/remote.py", line 561, in _download_descriptors
      self.content, self.reply_headers = _download_from_orport(endpoint, self.compression, self.resource)
    File "/usr/local/lib/python3.7/site-packages/stem/descriptor/remote.py", line 962, in _download_from_orport
      with relay.create_circuit() as circ:
    File "/usr/local/lib/python3.7/site-packages/stem/client/__init__.py", line 207, in create_circuit
      for cell in self._msg(create_fast_cell):
    File "/usr/local/lib/python3.7/site-packages/stem/client/__init__.py", line 160, in _msg
      response = self._orport.recv(timeout = 1)
    File "/usr/local/lib/python3.7/site-packages/stem/socket.py", line 416, in recv
      return self._recv(wrapped_recv)
    File "/usr/local/lib/python3.7/site-packages/stem/socket.py", line 274, in _recv
      return handler(my_socket, my_socket_file)
    File "/usr/local/lib/python3.7/site-packages/stem/socket.py", line 410, in wrapped_recv
      return s.recv()
    File "/usr/local/lib/python3.7/ssl.py", line 1037, in recv
      return self.read(buflen)
    File "/usr/local/lib/python3.7/ssl.py", line 913, in read
      return self._sslobj.read(len)
  socket.timeout: The read operation timed out

Through experimentation I also managed to get the following too...

  Traceback (most recent call last):
    File "download_descriptor.py", line 131, in <module>
      main()
    File "download_descriptor.py", line 113, in main
      endpoints = [args.download_from],
    File "/home/atagar/Desktop/stem/stem/descriptor/remote.py", line 485, in run
      return list(self._run(suppress))
    File "/home/atagar/Desktop/stem/stem/descriptor/remote.py", line 496, in _run
      raise self.error
  ssl.SSLError: ('The read operation timed out',)

Unfortunately since this is an SSL socket (rather than a standard one) receive
calls are liable to raise exceptions from both modules making this a bit of a
whack-a-mole game (socket's docs are particularly bad about describing the
array of exceptions that might get raised).