Restructure Object Storage chapter of Cloud Admin Guide

Restores Troubleshoot Object Storage
Removes Monitoring section, which was based on a blog

backport: havana
Closes-Bug: #1251515
author: nermina miller

Change-Id: I580b077a0124d7cd54dced6c0d340e05d5d5f983
Fixed 'openstack-config' commands in controller nova.conf

Corrected section from 'DEFAULT' to 'keystone_authtoken' for the
following keys: auth_host, admin_user, admin_tenant_name,
admin_password

Added commands for the following keys: auth_protocol, auth_port

Change-Id: I3f81e4055f50c32f9ccd941e2ae2d3e6fba25a19
Closes-Bug: #1261927
Merge "Restructure Object Storage chapter of Cloud Admin Guide"
Merge "Fixed 'openstack-config' commands in controller nova.conf"