[MSDTS Merge] Channel delete events or potentially other event listeners don't work.

The issue was found by HAP Community e2e tests. To check it run Scenario "Channel cannot be deleted due to event listener" from the HAP. 

Explanation:

HAP contains com.onehippo.cms.channel.ChannelDeleteHandler clss that implements ComponentManagerAware and has onChannelDeleteEvent() method that implements logic that prevents channel deletion according to the channel name ("undeletable"). The logic can be different depending on the goals but currently the code from that listener is not executed anymore.

Expected behavior: the test should pass well and the event listeners should work.