Disabled policy versions

Changelog: Disabled policy version in masterfiles because it is now managed and inventoried by default by the core agent inside sys.policy_version.
Ticket: ENT-4043
Signed-off-by: Victor Moene <victor.moene@northern.tech>

Author: victormlg

inventory/any.cf

@@ -19,6 +19,9 @@ bundle common inventory_any
       "policy_version" -> { "ENT-9806" }
         string => "$(default:control_common.version)",
         meta => { "inventory", "attribute_name=CFEngine policy version" };
+        if => isvariable("sys.policy_version"),
+        comment => concat( "Don't inventory the policy version from policy when it's available",
+                    " as a sys var to avoid duplicate values being inventoried.");
 
   reports:
       "DEBUG|DEBUG_$(this.bundle)"::