Adds complete ACL support for /v1/query/<query id or name>/execute.

This was already supported by previous changes to the ACL filter, so
we just added a test to show it working.

consul/prepared_query_endpoint_test.go

@@ -1417,6 +1417,7 @@ func TestPreparedQuery_Execute(t *testing.T) {
 		c.ACLDatacenter = "dc1"
 		c.ACLMasterToken = "root"
 		c.ACLDefaultPolicy = "deny"
+		c.ACLEnforceVersion8 = false
 	})
 	defer os.RemoveAll(dir1)
 	defer s1.Shutdown()
@@ -2138,6 +2139,58 @@ func TestPreparedQuery_Execute(t *testing.T) {
 		}
 	}
 
+	// Turn on version 8 ACLs, which will start to filter even with the exec
+	// token.
+	s1.config.ACLEnforceVersion8 = true
+	{
+		req := structs.PreparedQueryExecuteRequest{
+			Datacenter:    "dc1",
+			QueryIDOrName: query.Query.ID,
+			QueryOptions:  structs.QueryOptions{Token: execToken},
+		}
+
+		var reply structs.PreparedQueryExecuteResponse
+		if err := msgpackrpc.CallWithCodec(codec1, "PreparedQuery.Execute", &req, &reply); err != nil {
+			t.Fatalf("err: %v", err)
+		}
+
+		if len(reply.Nodes) != 0 ||
+			reply.Datacenter != "dc1" || reply.Failovers != 0 ||
+			reply.Service != query.Query.Service.Service ||
+			!reflect.DeepEqual(reply.DNS, query.Query.DNS) ||
+			!reply.QueryMeta.KnownLeader {
+			t.Fatalf("bad: %v", reply)
+		}
+	}
+
+	// Revert version 8 ACLs and make sure the query works again.
+	s1.config.ACLEnforceVersion8 = false
+	{
+		req := structs.PreparedQueryExecuteRequest{
+			Datacenter:    "dc1",
+			QueryIDOrName: query.Query.ID,
+			QueryOptions:  structs.QueryOptions{Token: execToken},
+		}
+
+		var reply structs.PreparedQueryExecuteResponse
+		if err := msgpackrpc.CallWithCodec(codec1, "PreparedQuery.Execute", &req, &reply); err != nil {
+			t.Fatalf("err: %v", err)
+		}
+
+		if len(reply.Nodes) != 8 ||
+			reply.Datacenter != "dc1" || reply.Failovers != 0 ||
+			reply.Service != query.Query.Service.Service ||
+			!reflect.DeepEqual(reply.DNS, query.Query.DNS) ||
+			!reply.QueryMeta.KnownLeader {
+			t.Fatalf("bad: %v", reply)
+		}
+		for _, node := range reply.Nodes {
+			if node.Node.Node == "node1" || node.Node.Node == "node3" {
+				t.Fatalf("bad: %v", node)
+			}
+		}
+	}
+
 	// Now fail everything in dc1 and we should get an empty list back.
 	for i := 0; i < 10; i++ {
 		setHealth(fmt.Sprintf("node%d", i+1), structs.HealthCritical)