Enrich override adds body instead of override

[Hooghof]

If you use the override option in the enrich step, the body in the bottom route does not replace the original body, but it is added to the original body. Remarkable is that the xml declaration is added as well.

Test cases
Instance: next and development
Tenant: Regression Tests
Flow: CB_Enrich

Received body (next)

Message Body:

John Doe Jane Doe Bill Doe Milly Doe

Expected body (development)

Bill Doe Milly Doe