(no ticket) Logging in supervisord-monitored processes

Some motivation: we stubmled upon the same error as
https://github.com/Supervisor/supervisor/issues/136
with the logs saved to /tmp, per default config.

Change-Id: I551946c4200fab30e248a6e4b4b369585081f9e2
Merge "(no ticket) Logging in supervisord-monitored processes"