Multimedia-Auth-Answer and Server-Assignment-Answer
defines the AVP User-Name as mandatory. It must also be
present on failure cases.
See 3GPP TS 29.273 Rel 17.
Signed-off-by: Alexander Couzens <lynxis@fe80.eu>
Do not Set Origin-Hosts with fd_msg_rescode_set before potential use of ogs_diam_message_experimental_rescode_set. This results in multiple Origin-Host/Realm AVPs.