give zaro access to zuul-dev server

Zaro needs access to zuul-dev server to test gerrit upgrades.  Zaro has read
and agrees to the following http://ci.openstack.org/sysadmin.html#ssh-access

Change-Id: I0a9e8a4fbe89b64b98510bb9a474d98ca8f0a01f
Merge "give zaro access to zuul-dev server"