Added tests for sys.policy_version

Signed-off-by: Victor Moene <victor.moene@northern.tech>

Author: victormlg

tests/acceptance/01_vars/01_basic/sys_policy_version.cf

@@ -0,0 +1,17 @@
+body common control
+{
+  bundlesequence => { "check" };
+  version => "1.2.3";
+}
+bundle agent check
+{
+  classes:
+    "ok"
+      expression => strcmp("$(sys.policy_version)", "$(default:control_common.version)");
+
+  reports:
+    ok::
+      "$(this.promise_filename) Pass";
+    !ok::
+      "$(this.promise_filename) FAIL";
+}