Incorrect config item in local_settings.py.example

The qos settings in horizon is not the same with
nova's.To fix it, modify the horizon
local_settings.py.example.

Change-Id: I1b31506e9b0e95be882edd490f3fa9dafe54abde
Closes-bug: #1324127
Add datastore and version information for backups

We should display the datastore name and datastore
version associated with a backup in the backups
table and the backup details view.

There is already a blueprint to add this information
to the instances table and details view so we have
used the same code and formatting here to ensure
consistency.

Change-Id: I286d430d4d670ee07298495e8f1b78795fa64609
Closes-Bug: #1340366
Merge "Add datastore and version information for backups"
Merge "Incorrect config item in local_settings.py.example"