CXF request via gateway-http add "Content-Length and Transfer-Encoding:chunked" in response headers

Issue

Request goes through gateway-http and the response that is being sent contains both the content-length as well as transfer-encoding headers set.

e.g;

HTTP/1.1 200 OK
Date: Fri, 19 Jan 2018 09:52:16 GMT
Content-Type: application/xml
Date: Fri, 19 Jan 2018 09:52:16 GMT
Content-Length: 980
Connection: close
Server: Jetty(9.2.19.v20160908)
Transfer-Encoding: chunked.