Drop stateless_sg property check from base method

This patch is addition to patch [1], in which tests of stateless
security group feature are checking for stateless_sg property,
and adding ingress rule accordingly.

This patch drops extra internal check inside
create_ingress_metadata_secgroup_rule, so it can be used without
dependency in stateless_sg property.

For example:
When testing security group logging integration with stateless
security groups, there will be no need to add specifically that extra
stateless_sg property.

[1] https://review.opendev.org/c/openstack/neutron-tempest-plugin/+/871397

Change-Id: Ic7b021ad262549aee0e4b3ef951791a6d30580b4
1 file changed