[Development] Moving to Gerrit 2.16.9

[Tor Arne Vestbø]

> On 27 Jun 2019, at 16:10, Frederik Gladhorn <Frederik.Gladhorn at qt.io> wrote:
> 
> On a related note, now that things are generally working with the new Gerrit, 
> I was wondering if we want to consider plugins. There is one to add reviewers 
> based on git blame
> https://gerrit-review.googlesource.com/admin/repos/plugins/reviewers-by-blame

YES

> and I'll give Gravatar a spin:
> https://gerrit-review.googlesource.com/admin/repos/plugins/avatars-gravatar

YES

> 
> We should also consider the various webhooks plugins. Comments appreciated.

YES, the core webhook one

Tor Arne