Reason attribute missing on reconstructed HTTPResponse objects from urllib3

[sigmavirus24]

Provided something like the following

import requests
import betamax

session = requests.Session()
recorder = betamax.Betamax(session)
with recorder.use_cassette('example'):
    response = session.get('https://httpbin.org/get')

assert response.reason == 'OK'
assert response.status_code == 200

raw = response.raw
assert raw.status == 200
assert raw.reason == 'OK'

The last line will fail because raw.reason is None. It should be the same value as was recorded.

[sigmavirus24]

@ceaess