Removing /org/openbmc/sensors

[Adriana Kobylak]

Hi all,

I'm finishing up the changes to remove the /org/openbmc/sensors path. 
This path just had a handful of sensors left, which with the exception 
of 2, were already defined in the 
phosphor-ipmi-sensor-inventory%/config.yaml files so they weren't being 
used. I moved the remaining 2 to the ipmi config files, so we're ready 
to deprecate the /org/openbmc/sensors path.

This change should be transparent since ipmi first looks for the 
requested sensor in its generated code from the yaml file, then if not 
found it looks for it in the /org/openbmc/sensors path (this 2nd lookup 
in the ipmi code can be removed once all changes are merged).

If you have any concerns about this change or questions about querying 
sensors outside the /org/openbmc/sensors path, you can reply or comment 
in the review where the system configs files in the skeleton repo are 
being updated to remove the sensors:
https://gerrit.openbmc-project.xyz/#/q/topic:org_sensors