sdbusplus: Improve error handling

Ignore exceptions from sdbusplus for objects that are queried
as part of a property watch but are expected to be missing
when the BMC starts up.

Tested: The phosphor-dbus-monitor app does not core dump
with the latest sdbusplus changes.

Change-Id: I0f6a850f0e426478bd1ccacb910a44079b9c8a54
Signed-off-by: Adriana Kobylak <anoo@us.ibm.com>
1 file changed