gluster: Restart nrpe nervice during host deploy.

This patch restarts the nrpe service if nrpe configuration
is modified during host deploy. This is done for reflecting
the config changes.

Change-Id: I7d1164d97ce9b95de0107990733dc7ecb1fe3974
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1110623
Signed-off-by: ndarshan <dnarayan@redhat.com>