(Empty commit)
Use our fork of requests which implements a custom exception that wraps urllib3's MaxRetryError (previously wrapped by request's ConnectionError),
the custom exception is implemented as a subclass of request's ConnectionError so as to be compatible with any dependant code.

We do this so we can implement our own HTTP transport adapter to specify max_retries, delay interval between HTTP request retries
for EAS requests (see inbox-eas repo). This in turn is an attempt to fix an ActiveSyncException('Could not connect to EAS server') error on
the testing box.

Sync runs, tests pass as before.