Fix acceptance test (#582)

Author: mrueg

test/custom/template_Test.yaml

@@ -27,11 +27,12 @@ spec:
     rego: |-
       package test
       
+      import future.keywords.if
       import data.lib.libraryA
       
       policyID := "P123456"
       
-      violation[{"msg": "msg"}] {
+      violation if {
           true # some comment
       }
     target: admission.k8s.gatekeeper.sh