Starting an LRA using a POST request does not set the HTTP Location header

LRA's are created by sending an HTTP POST request to the coordinator. POST requests that create new resources normally return the newly created resource in the Location header [1] or based on the "effective request URI" [2].

The coordinator implementation does not set the Location header.

[1] https://tools.ietf.org/html/rfc7231#section-6.3.2
[2] https://tools.ietf.org/html/rfc7230#section-5.5