node-proxy: support more Location value formats

node-proxy: support more Location value formats

After some tests, it turns out that depending on the hardware,
the header 'Location' which is returned by the server after logged can be different.
I could notice the following:

either:

Location: scheme://address:port/redfish/v1/SessionService/Session

or

Location: /redfish/v1/SessionService/Session

a previous tracker [1] was opened because I thought only the first one existed, which is wrong.

[1] https://tracker.ceph.com/issues/64894

Signed-off-by: Guillaume Abrioux <gabrioux@ibm.com>