give zaro access to review-dev server

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

Change-Id: I00b19b2c68debdb73c22e89ef208718c57e5149d
Merge "give zaro access to review-dev server"