fix puppet-tails' vpn for masterless puppet
Originally created by @groente on #16197 (Redmine)
Trying to apply tails::base on a masterless setup results in the following warnings:
Warning: You cannot collect exported resources without storeconfigs
being set; the export is ignored at
/etc/puppet/code/modules/tails/manifests/vpn/instance.pp:105:3
Warning: You cannot collect exported resources without storeconfigs
being set; the collection will be ignored at
/etc/puppet/code/modules/tails/manifests/vpn/instance.pp:115:3
Parent Task: #16165 (closed)