Replace Python 2 imports with six.moves import to make code compatible
with Python 2 and Python 3.
Replaced imports:
* BaseHTTPServer
* __builtin__
* cookielib
* httplib
This patch was generated by the six_moves operation of the sixer tool
version 0.4:
https://pypi.python.org/pypi/sixer
Manual changes:
* Disable pylint warnings on the HTTPSConnection classes because pylint
doesn't support importing from six.moves yet, see:
https://bitbucket.org/logilab/pylint/issue/550/
Blueprint cinder-python3
Change-Id: Ide6d4e3480f2c0a7eb4500aa88affe152ecc0401
f484310fe6