Checking if Language module is enabled before trying to get language entities.
Moved the ConfigSubscriber class into the acquia_contenthub_publisher module since it only invokes functions within that modules on successful logic checks.
Updated ConfigEntityHandler to properly handle locally loaded entities and not attempt to save new entities in place of existing ones.
This contains a single fix for PHP 5.3 compatibility that was causing problems for some sites and automated test integration for other contributed modules. Sites which use newer versions of PHP do not need to worry about updating to this release and should wait for the forthcoming 7.x-3.23 release.