meta-ampere: mtjade: Enable Redfish support for on-board sensors

Map FAN, temperature and voltage sensors with Redfish chassis instance
and enables association feature in phosphor-inventory-manager.
The bmcweb looks for the sensors associated with a chassis instance
in the association list. The list, which is associations.json file in
phosphor-inventory-manager, maps the dbus sensor objects to a chassis
inventory.

Tested:
1. Check power/voltage sensors reported in redfish/v1/Chassis/chassis/Power.
2. Check FANs/thermal sensors reported in redfish/v1/Chassis/chassis/Thermal.

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: Ie62a1c1a4edeaf165f834f7456c26711b4b42701
4 files changed