Drop naginator usage

Remove naginator classes from the Cisco-specific parts of
puppet_openstack_builder and Nagios from the reset_build_node.sh script

Change-Id: Ibc6e91ab9364370f1203c95a49542dc9e807223d
Implements: blueprint nagios-ectomy
(cherry picked from commit 1d463b21b21815f6bf16237ced34d29047d74d94)
Merge pull request #72 from CiscoSystems/bugs/1295248

Drop naginator usage