Comment 2 for bug 1429255

puppet_modules_source was missing from the hiera data.

From puppet.log:
Could not find data item puppet_modules_source in any Hiera data file and no default supplied at /etc/puppet/modules/osnailyfacter/modular/tools/tools.pp:19 on node node-1.local

That value was not in the data sent from Nailgun to Astute. It looks like that was changed here: https://review.openstack.org/#/c/156147/