sensor: Handle the response of find_openbmc_path
sensor: Handle the response of find_openbmc_path

The sensor path of the inventory items does not include the
inventory root, so would fail in the case of find_openbmc_path.
If the return code of find_openbmc_path indicates failure, then
it is logged and allowed to continue. The call to find_openbmc_path
would be eventually removed.

Change-Id: I7513bf4ab9b897ff5b64cfb77fd504e6ef4e227a
Signed-off-by: Tom Joseph <ccebe3ea0dc9f732d049c731e46285897e145ffb@in.ibm.com>

openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid,openbmc/phosphor-host-ipmid