Use six.moves.urllib.parse instead of urlparse

To keep Python 3.x compatibility, use six.moves.urllib.parse to
replace urlparse. tools/lintstack is changed to pass pylint test.

Partial-Bug: #1279611

Change-Id: I0ceaaccbf6c67b45609b4f2f5639c362b32d10ad
Merge "Use six.moves.urllib.parse instead of urlparse"
(Test commit) Change README to reflect Jio's fork of Cinder

Change-Id: I3f26c0a736e63725aec24ca2fa12c707b8e6460f