message: [openwrt] fix otbr attempt to call global 'threadget' (a nil value)
  On OpenWrt 19.07, modify the order to avoid call "connect_ubus" and
  "threadget" failed.
diff: local ubus = require "ubus"
  local sys = require "luci.sys"
  local utl = require "luci.util"
  - local state = threadget("state").State
  function connect_ubus(methods)
  local result
  return result
  end
  + function threadget(action)
  + local result = connect_ubus(action)
  +
  + return result
  + end
  +
  + local state = threadget("state").State
  +
  +
  +
  function addrlist()
  local k, v
  local l = { }
  return l
  end
  - function threadget(action)
  - local result = connect_ubus(action)
  - return result
  - end
  -%>
  <%+header%>
  