Allow kwargs in _get_server_port_id_and_ip4

As a part of the scenario/manager.py stabilization tracked by
the below BP the patch adds kwargs argument for
_get_server_port_id_and_ip4 method so that the consumers
are able to pass additional parameters if needed.

Change-Id: Ib5f51c7899cc81f76b247474e332f43583658875
Implements: blueprint tempest-scenario-manager-stable
1 file changed