Revert "Make it possible to call utils.Daemonize with uid and gid to run as"

This reverts commit 743b53d4.

Conflicts:

	lib/daemon.py

Trivial conflict resolved. This patch reverts changes from earlier permissions
separation stage. This is not needed anymore as start-stop-daemon takes care
of user switching

Signed-off-by: René Nussbaumer <rn@google.com>
Reviewed-by: Michael Hanselmann <hansmi@google.com>