use namespace value when making Var

pkg/accumulator/resaccumulator_test.go

@@ -206,6 +206,7 @@ func makeVarToNamepaceAndPath(
 		ObjRef: types.Target{
 			Gvk:       gvk.Gvk{Version: "v1", Kind: "ConfigMap"},
 			Name:      "environment",
+			Namespace: namespace,
 		},
 		FieldRef: types.FieldSelector{FieldPath: path},
 	}