Added sample files for Block Storage.

Added cinder.conf (complete), cinder-api-paste.ini,
cinder-policy.json, and cinder-rootwrap.conf file references
(cinder project). Placed under new section.

Partial-Bug: #1281348

Change-Id: I356797441c6307ad1a5ee3dbae1bf24ad95b1ddb
Merge "Added sample files for Block Storage."