temp pin to prev version of agent before its breaking change

Author: davidmalloncares

.fixtures.yml

@@ -7,7 +7,9 @@ fixtures:
     reboot: "puppetlabs/reboot"
   repositories:
     facts: "https://github.com/puppetlabs/puppetlabs-facts.git"
-    puppet_agent: "https://github.com/puppetlabs/puppetlabs-puppet_agent.git"
+    puppet_agent:
+      repo: 'https://github.com/puppetlabs/puppetlabs-puppet_agent.git'
+      ref: v4.22.0
     provision: "https://github.com/puppetlabs/provision.git"
     stdlib: "https://github.com/puppetlabs/puppetlabs-stdlib.git"
     apply_helpers: "https://github.com/puppetlabs/puppetlabs-apply_helpers"