Merge remote-tracking branch 'origin/FAPI_fix_setup_time_from_overflowing' into integration_2023_w02

Fix setup_time overflow in vnf processing thread, preventing gNB from stopping message processing once setup_time overflowed

- Mention python version and separate Python/own modules
- Use constants for registry and namespace name
- Provide OC url in oc login
- Do not perform oc logout in background

ASN_SEQUENCE_ADD return code was checked only in 0.5% of calls, existing errors not detected by sanitize address

Not only the teid is received from the DU but also the IP address. We
have to use it too.

Also, don't connect the UDP socket. The parameter remote_s_address in the
configuration file must not be used, at least not for gtp-u because the
IP address is received from the DU (plus for later, for multiple DUs, it
won't work at all).

Signed-off-by: Raphael Defosseux <raphael.defosseux@eurecom.fr>

in fact it syncs the USRP time to GPS time when available and then derives the SFN from the USRP time.