GitLab

Added/moved signalling logic into fake clients:
* FakeConciergeClient::StartTerminaVm sends OnTremplinStartedSignal.
* FakeCiceroneClient::CreateLxdContainer sends OnLxdContainerCreatedSignal
* FakeCiceroneClient::StartContainer sends OnContainerStartedSignal

Bug: 878324
Change-Id: I7bc8caabc5f4811595d9d58c893e2beda88918dc
Reviewed-on: https://chromium-review.googlesource.com/1193525Reviewed-by: Ryo Hashimoto <hashimoto@chromium.org>
Reviewed-by: Nicholas Verne <nverne@chromium.org>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#588337}