srvcfg-mgr: Use poll method to trigger init

Latest up-stream sync causes issue, due to which unable to receive
StartupFinished signal from systemd1. Hence triggering the poll
method too, so service will be able to init, once all units are
loaded by systemd1

Tested:
1. Verified objects are exposed during boot-up and working
as expected

Change-Id: I0757faf50f8d8915d4641d1dbd6e13f85420a913
Signed-off-by: Richard Marian Thomaiyar <richard.marian.thomaiyar@linux.intel.com>
3 files changed