Removes unused nvp plugin config param

nvp_cluster_uuid is no longer used; it was missed
during the configuration file tweaks that was done
during Havana.

Closes-bug: #1251086
(cherry-picked from commit  Id6dd684833c99453cd97d88584be04d99fd21550)

Change-Id: Id6dd684833c99453cd97d88584be04d99fd21550
Merge "Removes unused nvp plugin config param" into stable/havana