Convert node_test_node_access_all_uid to state system

Thanks for the work.

There's no need for the system update as this variable is only ever used during testing. Also the state name should be
node_access_test.no_access_uid as it "belongs" to the node_access_test module.

+++ b/core/modules/node/tests/modules/node_access_test/node_access_test.moduleundefined
@@ -21,7 +21,7 @@ function node_access_test_node_grants($account, $op) {
+  if ($op == 'view' && $account->uid == state()->get('system.node_test_node_access_all_uid', 0)) {

Should be something like as ->get() does not support providing a default value

$no_access_uid = state()->get('node_test_access.no_access_uid') ?: 0;
if ($op == 'view' && $account->uid == $no_access_uid) {

How's this?

Bleh.

#6: node_test_node_access_all_uid-1798868-6.patch queued for re-testing.

This is RTBC if it still applies.

Committed and pushed to 8.x. Thanks!