LPS-45525 Blogs Entry does not show up in Asset Publisher after being edited

Hi @robertoDiaz, could you please give me a hand on this?

It's basically a recommit of https://issues.liferay.com/browse/LPS-45525 original fix. @mdelapenya had reverted it because it was breaking some commits.

However, while I was running the tests that had failed on http://ci.liferay.org.es/jenkins/job/liferay-portal-master/1984/testReport/ I noticed that `BlogsUserNotificationTest` just passes on a clean DB. If I run it multiple times, it fails.

All the tests are passing now, except of `StagingImplTest` which is already breaking on the latest master even without my fix.

cc @sergiogonzalez 

Thanks