test-daemons remove their docker.pid when stopped, so the `.integration-daemon-stop`
script did not find the mounts for those daemons, and therefore was not unmounting
them.
As a result, cleaning up the bundles directory on consecutive runs of the tests would fail;
rm: cannot remove 'bundles/test-integration/TestDockerSwarmSuite/TestSwarmInit/d1f188f3f5472/root': Device or resource busy
This patch unmounts the root directory of the daemon as part of the cleanup step.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
1fe7a9552c