Update quantum security group information

This patch updates the security group information with the new nova
integration bits and removes the references to proxy_mode and external_id
since this was removed from quantum.

Fixes bug 1088304

Change-Id: If95bc2c6a656ed4bd1bf64f2f799c379f6ee4bca
Ads instance evacuation documentation.

The documentation contains details about required configuration
and cli commands.

blueprint rebuild-for-ha

Change-Id: I682eb3055c1099e7a383c51355e5657867d261fc
Merge "Ads instance evacuation documentation."
Merge "Update quantum security group information"