Ok - it makes sense to remove monitoring for nova network.  I think if you check https://github.com/crowbar/barclamp-nova/blob/master/chef/cookbooks/nova/templates/default/nova_nrpe.cfg.erb that you will see there is a check_nova_network command defined here.  Shouldn't we be removing that command?  If so, there is another reference in this file to it that should be removed as well.