Merge pull request #1407 from puppetlabs/pdksync_(MAINT)_Pin_puppetlabs-puppet_agent

pdksync - (CONT-768) Pin puppetlabs-puppet_agent

Author: david22swan

Diff for: .fixtures.yml

@@ -7,7 +7,9 @@ fixtures:
     facts: 'https://github.com/puppetlabs/puppetlabs-facts.git'
     firewall: "https://github.com/puppetlabs/puppetlabs-firewall.git"
     provision: "https://github.com/puppetlabs/provision.git"
-    puppet_agent: 'https://github.com/puppetlabs/puppetlabs-puppet_agent.git'
+    puppet_agent:
+      repo: 'https://github.com/puppetlabs/puppetlabs-puppet_agent.git'
+      ref: v4.12.1
     stdlib: "https://github.com/puppetlabs/puppetlabs-stdlib.git"
     yumrepo_core: "https://github.com/puppetlabs/puppetlabs-yumrepo_core.git"
     systemd: "https://github.com/voxpupuli/puppet-systemd.git"