Drop .json suffix from zuul address
Drop .json suffix from zuul address

https://github.com/openstack-infra/zuul/commit/9010dc50f41145ebdf7f65dfc71fc35f0223c20d
in zuul removed the .json from the status endpoint and we need to
point at the new location.

cybertron/zuul-status,cybertron/zuul-status,cybertron/zuul-status