Enable bridge debugging services on the ci jobs

Depends-On: https://review.opendev.org/#/c/730772/
Change-Id: Ibf48340828cb70746dfd6de06eefddab5a0e1d84
diff --git a/zuul.d/base.yaml b/zuul.d/base.yaml
index b6d9f90..db59ac0 100644
--- a/zuul.d/base.yaml
+++ b/zuul.d/base.yaml
@@ -34,6 +34,8 @@
         neutron-port-forwarding: true
         neutron-conntrack-helper: true
         neutron-tag-ports-during-bulk-creation: true
+        br-ex-tcpdump: true
+        br-int-flows: true
       devstack_local_conf:
         post-config:
           $NEUTRON_CONF: