Capture HTTP 408 error and raise a more explicit Exception
Do you think we could raise a more meaningful exception during soledad client initialization?
Something like FailedToObtainRemoteLockError or something like that?
HTTPError: HTTPError(408, '{}\r\n')
If so, we should update client too.
(from redmine: created on 2013-11-25, closed on 2014-03-19)