Fix invalid rego in init policies

We need to use the newer opa v1 syntax. This fixes a failing
acceptance test in features/initialize.feature.

Side-note: The `ec init policy` command is a bit undercooked, and I
don't it's been used much. In this commit I'm just doing the minimum
required to make the tests pass, and resisting the urge to also try
to improve it.

Ref: https://issues.redhat.com/browse/EC-1130

Author: simonbaird

cmd/initialize/init_policies.go

@@ -68,7 +68,7 @@ func initPoliciesCmd() *cobra.Command {
 				#   solution: Easy
 				#   collections:
 				#   - A
-				deny[result] {
+				deny contains result if {
 					false
 					result := "Never denies"
 				}