Please help write me 
Repo of tests for Zuul: https://github.com/Juniper/contrail-test
https://review.opencontrail.org/admin/repos/Juniper/contrail-test
Until Contrail is migrated to Tungsten Fabric current gerrit is still https://review.opencontrail.org/
In the gerrit there are two Zuuls involved:
- Legacy Zuul v3 (voting) - http://zuulv3.opencontrail.org/
- New Zuul TF (non-voting) - http://zuul.sytes.net:8080/
The latter one will eventually during migration process replace Zuul v3 as voting one.
Document explaining works on new CI resides here: https://docs.google.com/document/d/1CMwfU_fwgf8Mlae-1z13XvhWBi3p79PKOMSALf2MGf0/edit?usp=sharing