ci: avoid using docker bridge ip in tests
ci: avoid using docker bridge ip in tests

boliu83/docker-squid,maqsoodumt/docker-squid,sameersbn/docker-squid,zultron/docker-provisioning,linearregression/docker-squid-s3,korczis/docker-squid-rubygems-proxy,korczis/docker-squid-rubygems-proxy,Optibus/docker-squid,opendoor-labs/docker-squid-s3