Enhance automation of ci-run
Enhance automation of ci-run

Handle breakage in reviews which add new migrations by allowing
automated testers to delete any broken test database left behind
by a previous review before creating a new one, without prompting.

Tasks (like lavabot) should use ./ci-run --noinput

Change-Id: I25c99d8f856170e3be34ed1b318c9294d371c475

Linaro/lava-server,Linaro/lava-server,Linaro/lava-server,Linaro/lava-server