Since the job will have to run on the Zuul executor, it needs to
only rely on stdlib, yaml and requests (which are already installed
on the executor).
Change-Id: Id4e5a88d352e95402d0899deceade6fed8146619
This is the first step into automating PTL/liaison approval.
This tool will check that PTL/liaisons either authored the change or
approved it.
Change-Id: I1bbb371997e9e92f39eff47adb4d3d176af35de7