This repo does not support Python 2 anymore, so we don't need six for compatibility between Python2 and 3, convert six usage to Python 3 code. Change-Id: Icba56808f38277b27af2ae5aac4b8507dee71b3b
Convert regions API to flask native dispatching. Change-Id: Ic38065441adb33f1f0550a6ae4cb1bd94ff2e079 Partial-Bug: #1776504