privetd: Complete end to end bootstrapping test

BUG=brillo:8
TEST=privet_PrivetSetupFlow passes 30/30 times.

Change-Id: Idab9495c52c7db2b9f43cf4f2f1fc81bd9c102bb
Reviewed-on: https://chromium-review.googlesource.com/246662
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Tested-by: Christopher Wiley <wiley@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>
4 files changed