Come up to current agent versions

DEVOPS-5415

Automation is disabled for our account level.

playbooks/roles/mongo_mms/defaults/main.yml

@@ -5,10 +5,10 @@ pkg_format: "deb"
 
 agents:
   - agent: mongodb-mms-monitoring-agent
-    version:  "5.4.1.350-1"
+    version:  "5.6.0.364-1"
     config: "/etc/mongodb-mms/monitoring-agent.config"
     dir: "monitoring"
   - agent: mongodb-mms-backup-agent
-    version: "5.0.1.453-1"
+    version: "5.2.0.473-1"
     config: "/etc/mongodb-mms/backup-agent.config"
     dir: "backup"