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
Merge pull request #68 from CiscoSystems/bp/drop_nagios

Drop naginator usage