AllowedHostTransitions: look for on dbus

Commit [1] introduced a new optional dbus property that OpenBMC
developers can populate to define which
redfish/v1/Systems/system/ResetActionInfo AllowableValues are.

Look for that new property on dbus. If not found, hard code the
previous values otherwise utilize the property to fill in the return
value.

Tested:
- Put new property on dbus and confirmed Redfish API returned expected
  values:
```
curl -k -H "X-Auth-Token: $token" -X GET https://${bmc}/redfish/v1/Systems/system/ResetActionInfo
{
  "@odata.id": "/redfish/v1/Systems/system/ResetActionInfo",
  "@odata.type": "#ActionInfo.v1_1_2.ActionInfo",
  "Id": "ResetActionInfo",
  "Name": "Reset Action Info",
  "Parameters": [
    {
      "AllowableValues": [
        "ForceOff",
        "PowerCycle",
        "Nmi",
        "On",
        "ForceOn",
        "ForceRestart",
        "GracefulRestart",
        "GracefulShutdown"
      ],
      "DataType": "String",
      "Name": "ResetType",
      "Required": true
    }
  ]
}
```
- Did not run redfish validator as response was same as previous

[1]: https://gerrit.openbmc.org/c/openbmc/phosphor-dbus-interfaces/+/68933

Change-Id: Iecece14e7ff55db98d96df71b106ecc9e3f0ac33
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/Redfish.md b/Redfish.md
index cdec1f90c0..93105ebfce 100644
--- a/Redfish.md
+++ b/Redfish.md
@@ -936,6 +936,14 @@ other.
 - TotalThreads
 - Version
 
+### /redfish/v1/Systems/system/ResetActionInfo/
+
+#### ActionInfo
+
+- Parameters/AllowableValues
+- Parameters/DataType
+- Parameters/Required
+
 ### /redfish/v1/Systems/system/Storage/
 
 #### StorageCollection