Add Settings daemon service as a dependent service.

Added xyz.openbmc_project.Settings.service as a depedent service
for ipmid daemon and service to ensure restrictionMode is created
or not.

TESTED : Built Facebook YosemiteV2 images and loaded on the
target hardware. Verified dependent service added and restriction
mode enabled.

Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
Change-Id: Ibb9300e440741fa71b2a6693ba2904d641156965