Delete does not map 404 correctly

[Sherpard]

When calling to Delete on a descendant of DeleteResource if the key is correct, the method is executed correctly and returns a 204 as expected

But if the Identifier is not found, instead of a ErrorCode 404, a 405 is returned

[adrienlauer]

This is due to the forward on 404 from Jersey which forwards the request down the filter chain and ultimately to the default servlet, which doesn't like DELETE verbs .