Fix error KeyError: 'addresses' for two tests

When we use create_test_server, waiters.wait_for_server_status
returns servers with more details (including server IP address in case
we don't use fip). It is needed successfully execute
wait_for_ssh_or_ping and finally get_server_ip. The last function
(get_server_ip) extract IP adress just from server dict and fails
if there is no adresses dict in it.

Closes-Bug: 1996468
Change-Id: Ib1157f4bb6fe42b3fbcdd3eafac0b5063d1a9e56
1 file changed