Comment 5 for bug 1670223

@paulgear, thanks, for the offer. I came up with a simple patch, if you could take a look would be great.

The other I was thinking is to make sure charms (in this case glance) don't call to add_init_service_checks() before nagios-nrpe-server is installed, but I'm not sure if it's a good approach considering that we may have to end up patching multiple charms due to the change in the behavior.