Decode HTTP responses, fixes bug #1282861

By default, the HTTPConnection class expose the raw.read urllib3
function which doesn't do any decoding on the http response.
We can fix this by passing decode_content=True to raw.read().

Change-Id: I7d42d31ae516705d1bde2769e642931308116c7a
Merge "Decode HTTP responses, fixes bug #1282861"