mod_rest: List all error conditions in OpenAPI spec
These are not handled by datamanager but by util.stanza and util.error,
so they are not represented in the JSON schema file.
module:set_global();
local log = _G.log;
module:add_timer(60-os.date("%S"), function (now)
log("info", "-- MARK --");
return 90 - ((now + 30) % 60);
end);