bug 1246967 - Fix test_json_data_null_uuid
bug 1246967 - Fix test_json_data_null_uuid

This test was using a test utility (doc_rev) that was removed in a
previous commit (69cf488).

safwanrahman/kuma,Elchi3/kuma,yfdyh000/kuma,jwhitlock/kuma,mozilla/kuma,ollie314/kuma,Elchi3/kuma,jgmize/kuma,Elchi3/kuma,SphinxKnight/kuma,yfdyh000/kuma,mozilla/kuma,yfdyh000/kuma,escattone/kuma,jwhitlock/kuma,jwhitlock/kuma,a2sheppy/kuma,yfdyh000/kuma,jwhitlock/kuma,a2sheppy/kuma,jwhitlock/kuma,ollie314/kuma,mozilla/kuma,Elchi3/kuma,SphinxKnight/kuma,jgmize/kuma,SphinxKnight/kuma,jgmize/kuma,SphinxKnight/kuma,safwanrahman/kuma,mozilla/kuma,safwanrahman/kuma,jgmize/kuma,jgmize/kuma,Elchi3/kuma,safwanrahman/kuma,mozilla/kuma,escattone/kuma,yfdyh000/kuma,SphinxKnight/kuma,ollie314/kuma,escattone/kuma,safwanrahman/kuma,ollie314/kuma,jgmize/kuma,safwanrahman/kuma,a2sheppy/kuma,a2sheppy/kuma,a2sheppy/kuma,ollie314/kuma,yfdyh000/kuma,SphinxKnight/kuma,ollie314/kuma