Correctly access replication log status value

While debugging #2791789: Workspace should report conflicts before replication I noticed that calls to retrieve the replication log value were being done like so:

    if (($response instanceof ReplicationLogInterface) && $response->get('ok')) {

This is incorrect as it returns a class, which is always truthy.

Proposed Resolution

Change these checks to compare against a boolean:

    if (($response instanceof ReplicationLogInterface) && ($response->get('ok')->value === TRUE)) {