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
Move the HTML-escaping JavaScript code to a separate function

We might need to use it in more than one place, and it will be easier
to remember about escaping if we have an utility function for that.

Change-Id: I408a1ce055bb2f07b3c146dfa6eb5122fd5434d8
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 "Move the HTML-escaping JavaScript code to a separate function"
Merge "Add datastore and version information for backups"
Merge "Incorrect config item in local_settings.py.example"