Add Status information for Power Supply

This commit is to add PowerSupply State/Health status according to the
Redfish PowerSupply schema.

If the `xyz.openbmc_project.Inventory.Item`
interface does not exist, the state status property is set to
default "Present".

If the `xyz.openbmc_project.State.Decorator.OperationalStatus`
interface does not exist, the health status property is set to
default "OK".

ref: http://redfish.dmtf.org/schemas/v1/PowerSupply.v1_5_0.json

Code that updates the OperationalStatus for all the inventory
https://github.com/openbmc/openpower-vpd-parser/blob/ \
3fb026386546cfd288ab4f86156c9aa0ffa145d6/ibm_vpd_app.cpp#L620

Tested: Validator passes
curl -k -H "X-Auth-Token: $token" -X GET
https://${bmc}/redfish/v1/Chassis/chassis/PowerSubsystem/
PowerSupplies/powersupply0
{
"@odata.id": "/redfish/v1/Chassis/chassis/PowerSubsystem/
              PowerSupplies/powersupply0",
"@odata.type": "#PowerSupply.v1_5_0.PowerSupply",
"Id": "powersupply0",
"Name": "powersupply0",
"Status": {
"Health": "OK"
"State": "Enabled"
}
}

Signed-off-by: George Liu <liuxiwei@inspur.com>
Change-Id: I121b665a4e605024644cc7c9392f88a71703481e
Signed-off-by: Lakshmi Yadlapati <lakshmiy@us.ibm.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/Redfish.md b/Redfish.md
index c416a5476b..75121d9f9c 100644
--- a/Redfish.md
+++ b/Redfish.md
@@ -379,6 +379,8 @@ Fields common to all schemas
 
 ##### PowerSupply
 
+- Status
+
 ### /redfish/v1/EventService/
 
 #### EventService