Disable __TypeId__ header for AAI event publishing

Disable __TypeId__ header for AAI event publishing

- with the refactorings in AAI-3931 and AAI-4014 message producing was changed
  to serialize <String,NotificationEvent> instead of <String,String> to be more expressive
- when doing so, spring will add a __TypeId__ header to the message to inform consumers
  about the type of the message
- spring consumers will validate this annotation and will
    - throw an exception when the package (org.onap.aai.[...].NotificationEvent) is not among the trusted packages
    - throw an exception if the class is not on the classpath and the app thus does not know how to deserialize it
- since this is a breaking change for the consumers and it would just cause implementation effort, the header is removed to restore the old behaviour

Issue-ID: AAI-4074
Change-Id: Ibf83c235739a71b64471ee85d0b5e559082c271e
Signed-off-by: Fiete Ostkamp <Fiete.Ostkamp@telekom.de>