Sync the zaqar.conf.sample file

Zaqar juno was released with an out-of-date version of the config sample
file. This backport updates the config sample to match the status of
waht's in the project.

(cherry picked from commit 90dd98da01326d5285aa3cad9e456a4f90e27c68)

Change-Id: I63a79ddc52b5a397bc1c5c5c3ba2a98c4cb0d5f0