Add initial Python SDK docs to user guide

Initial addition of Python SDK content to user's guide. Describes
how an end-user can employ the Python bindings to automate tasks.

This initial commit adds info on:
 - How to authenticate with Identity, Commpute, Image, and Network
   clients
 - How to manage images

Change-Id: Ie8c4120acc7739c0bc4bddd99ffdbfbfbe241e0f
Revert "Removes wildcard entry for mysql permissions"

This reverts commit 809b7b1be0df547b1ea984c6b4c0021038709344

See discussion in Bug: #1252267 for the reason why to revert 
this: The way we configure in the guide, we need to have
access via the FQDN.
Disable Disqus comments on HA Guide

Note that this works since the Jenkins jobs does not pass
-Dcomments.enabled to the job like all the other jobs.

Change-Id: I02261d507d9a49a7fa1fe0cc39ad1ae89c3b8423
Further Clarified How VMDK Driver Creates Cinder Volume Directory

This change replaces Change Id8adb9b9 which was abandoned because subsequent amendments kept reasserting changes that should have been abandoned.

backport: none
Closes-Bug: #1265044

Change-Id: I1064ba2cbb274b445dfc9c4dd5a7fb5b6973d2d7
adds quiz questions into associate guide

first of 6 testing sections in the associate guide. method for
gathering results will be added later.

Closes Bug: #1263566

Change-Id: I5375086cf956778e01a4ed105a0b5041ff3a46cc
Merge "adds quiz questions into associate guide"
associate guide controller quiz

second batch of quiz questions. for
associate guide.

Closes Bug: #1263609

Change-Id: Ic72cf3ba17d49751022eed9c5f7e98d015bab42a
Merge "Further Clarified How VMDK Driver Creates Cinder Volume Directory"
Merge "Add initial Python SDK docs to user guide"
Merge "Revert "Removes wildcard entry for mysql permissions""