x-http-method-override is not honored

[ircecho]

If have an API method that is annotated as follows

 @ApiMethod(
      path: 'android/orders/{orderId}',
      method: 'PATCH')

and executed with this request:

POST /api/ma_api/v2/android/orders/519?alt=json HTTP/1.1
Accept-Encoding: gzip
Authorization: ...
User-Agent: Google-API-Java-Client Google-HTTP-Java-Client/1.21.0 (gzip)
x-http-method-override: PATCH
Content-Type: application/json; charset=UTF-8
Host: 10.0.0.17:8180
Connection: Keep-Alive
Content-Length: 43

{"reason":"test reason","status":"Refused"}

I get a
2015-12-16 16:12:10.018 0:00:00.202175 POST [404] /api/ma_api/v2/android/orders/519?alt=json
404 error, where the method should be called correctly.

Changing the annotation to

 @ApiMethod(
      path: 'android/orders/{orderId}',
      method: 'POST')

rectifies the situation, so there are no path issues.