[MERGE] Some cleanup in log tests

[Ian Clatworthy]

Vincent Ladeuil wrote:

> Ian, you may have some branches were that may conflict so I
> thought you may want a preview before I go further.

Hi Vincent,

I have no outstanding log branches bar an experimental one playing with
options for speeding up some CHKInventory APIs. Thanks for the heads-up
but you can go ahead and land this immediately IMO given jam has
approved it.

Ian C.