[PATCH 4 of 4 STABLE] tests: expand test coverage for updating phases

[Augie Fackler]

On Sun, Feb 18, 2018 at 10:23:07AM -0800, Gregory Szorc wrote:
> # HG changeset patch
> # User Gregory Szorc <gregory.szorc at gmail.com>
> # Date 1518978019 28800
> #      Sun Feb 18 10:20:19 2018 -0800
> # Branch stable
> # Node ID 337491de32e3e273c7b98a5259bd053f44acdede
> # Parent  ec71cddd8b6915f7fa2029c641a8385bef1392c3
> tests: expand test coverage for updating phases

queued for stable, reasoning seems sound, thanks