[PATCH] tests: more completely restore the environment in syshgenv

[Augie Fackler]

On Wed, Jun 28, 2017 at 12:34:56PM -0700, Adam Simpkins wrote:
> # HG changeset patch
> # User Adam Simpkins <simpkins at fb.com>
> # Date 1498677802 25200
> #      Wed Jun 28 12:23:22 2017 -0700
> # Node ID 236c593941ab8034c500039c54bee0b3a19a0cef
> # Parent  649cb52c8cd94ab98068004e40bf9947de62a0ce
> tests: more completely restore the environment in syshgenv

queued, thanks