These will be killed on a cron schedule, allowing us to ensure old containers don't run once memory pressure clears up - even across restarts.
Closes#3225
Some systems - such as a mounted read-only CIFS filesystem - do not fully support chown, and chowning should be considered optional for cases when the host os has already taken care of permissioning. This commit allows users to disable chown by setting a property on the scheduler-docker-local plugin.
