Fixes wrong variable in nagios plugin template
Fixes wrong variable in nagios plugin template

Change-Id: Ib0b2f5e0c0fbb0bd20a306cd81aadb2c4daf71b5

openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca