[Event] Collect kernel.event_listener events

[Haehnchen]

We now have a findTaggedServices also in java so reuse it to collect the event name of this known classes. need them for #529

Infrastructure done by XML implementation #531

• XML

<tag name="kernel.event_listener" event="kernel.exception" method="onKernelException" />

• YAML

        tags:
            - { name: kernel.event_listener, event: kernel.exception, method: onKernelException }