[CI] Fix broken docker registry

This patch fixes CI broken by the following patches:
- https://review.opendev.org/c/openstack/kolla-ansible/+/689870
- https://review.opendev.org/c/openstack/kolla-ansible/+/751795



Co-Authored-By: Vladislav Belogrudov <vladislav.belogrudov@dell.com>
Change-Id: If26a9f9791ce9b7817bcd410ea045d3e3b04b651

tests/setup_gate.sh

@@ -105,7 +105,7 @@ EOF
 
     mkdir -p /tmp/logs/build
 
-    sudo docker run -d -p 4000:5000 --restart=always -v /opt/kolla_registry/:/var/lib/registry --name registry registry:2
+    sudo docker run -d --net=host -e REGISTRY_HTTP_ADDR=0.0.0.0:4000 --restart=always -v /opt/kolla_registry/:/var/lib/registry --name registry registry:2
 
     python3 -m venv ~/kolla-venv
     . ~/kolla-venv/bin/activate