Replace urllib/urlparse with six.moves.*

urllib and urlparse are divided to different module in Python 3.
Use six.moves.* to make them on Python 2 and Python 3.

Part of blueprint keystone-py3kcompat

Change-Id: I54d322c51f0f87e3ec00c69016251d6ea5015adb
fix grammar error in keystone-manage.rst

remove "through" from "with through the keystone REST api" and fix "keystone" to "Keystone" and "can not" to "cannot".

Change-Id: I1cc74b36cdb7de28be5dc4c3ee74922da8020804
Closes-Bug: #1273862
Merge "Replace urllib/urlparse with six.moves.*"
Merge "fix grammar error in keystone-manage.rst"