[Back-port to 4.1] Resource bundle registry not invalidated on replication / JCR change

When using the replication addon [1], resource bundles are moved correctly from one repository to another. However, sites that run on the target repository do not show any changed resource bundle values.

This (most probably) is caused by the fact that the resource bundle registry is invalidated only on Hippo workflow events, not on JCR events.

This is also visible if a value is changed using Console, like so:

• build/run archetype project with feature "Simple content".
• the local site shows "©2017" in the footer
• in Console, change /content/documents/administration/labels/global/global/resourcebundle:messages

Expected: site shows the changed value
Actual: site still shows "©2017"

[1] https://www.onehippo.org/library/enterprise/enterprise-features/replication/replication-overview.html