Puppet 7 compatibility

Author: deric

.fixtures.yml

@@ -10,5 +10,7 @@ fixtures:
     provision: "https://github.com/puppetlabs/provision.git"
     puppet_agent: 'https://github.com/puppetlabs/puppetlabs-puppet_agent.git'
     stdlib: "https://github.com/puppetlabs/puppetlabs-stdlib.git"
-    yumrepo_core: "https://github.com/puppetlabs/puppetlabs-yumrepo_core.git"
+    yumrepo_core:
+      repo: "https://github.com/puppetlabs/puppetlabs-yumrepo_core.git"
+      ref: "bd92e7c23ad4cfaaee719bf11d0d466eeb4dea5c"
     systemd: "https://github.com/voxpupuli/puppet-systemd.git"