When the dbus-daemon in the sidecar is started as "root" user, it fails
with the following log entry:
Failed to start message bus: Failed to drop capabilities: Operation not permitted
By starting the sidecar as "dbus" user (uid=81), the executable does not
try to drop capabilities, and starts successfully.
Signed-off-by: Niels de Vos <ndevos@ibm.com>
(cherry picked from commit 320b112cc6)