Add PowerLimitWatts in EnvironmentMetrics

The EnvironmentMetrics schema[1] provides for efficient retrieval of
environmental metrics by separating them from performance metrics.
EnvironmentMetrics is a property of the Chassis schema since v1_15_0[2].

This commit extends the GET EnvironmentMetrics response to include
PowerLimitWatts property. PowerLimitWatts has been part of the
EnvironmentMetrics schema since v1_1_0. PowerLimitWatts is a
ControlSingleExcerpt[3].

Additionally this commit implements PATCH for the PowerLimitWatts
property of EnvironmentMetrics.

The PowerLimitWatts was added to Redfish release 2021.2 [4] to be used
instead of the deprecated Power schema.[5]

[1] https://redfish.dmtf.org/schemas/v1/EnvironmentMetrics.v1_5_0.json
[2] https://redfish.dmtf.org/schemas/v1/Chassis.v1_28_0.json
[3] https://redfish.dmtf.org/schemas/v1/Control.v1_7_0.json
[4] http://redfish.dmtf.org/schemas/Redfish_Release_History.pdf
[5] https://redfish.dmtf.org/schemas/v1/Power.v1_7_3.json

Tested:
(Used p10bmc hardware simulator with association added)

1. Redfish Service Validator passes

2.GET PowerLimitWatts in Chassis EnvironmentMetrics

```
curl -k -H "X-Auth-Token: ${token}" -X GET https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics
{
  "@odata.id": "/redfish/v1/Chassis/chassis/EnvironmentMetrics",
  "@odata.type": "#EnvironmentMetrics.v1_3_0.EnvironmentMetrics",
  ...
  "PowerLimitWatts": {
    "AllowableMax": 4294967295,
    "AllowableMin": 0,
    "ControlMode": "Disabled",
    "SetPoint": 0
  }
}
```

3. GET error handling of invalid chassisId
```
curl -k -H "X-Auth-Token: ${token}" -X GET https://${bmc}/redfish/v1/Chassis/chassisERROR/EnvironmentMetrics
{
  "error": {
    "@Message.ExtendedInfo": [
      {
        "@odata.type": "#Message.v1_1_1.Message",
        "Message": "The requested resource of type Chassis named 'chassisERROR' was not found.",
        "MessageArgs": [
          "Chassis",
          "chassisERROR"
        ],
        "MessageId": "Base.1.19.ResourceNotFound",
        "MessageSeverity": "Critical",
        "Resolution": "Provide a valid resource identifier and resubmit the request."
      }
    ],
    "code": "Base.1.19.ResourceNotFound",
    "message": "The requested resource of type Chassis named 'chassisERROR' was not found."
  }
}
```

4. PATCH to set SetPoint in PowerLimitWatts
1> When the value is in the allowable range, the modification succeeds.
```
curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/json" -X PATCH -d'{ "PowerLimitWatts": {"SetPoint": 10}}' https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics

curl -k -H "X-Auth-Token: ${token}" -X GET https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics
{
  "@odata.id": "/redfish/v1/Chassis/chassis/EnvironmentMetrics",
  "@odata.type": "#EnvironmentMetrics.v1_3_0.EnvironmentMetrics",
  ...
  "PowerLimitWatts": {
    "AllowableMax": 4294967295,
    "AllowableMin": 0,
    "ControlMode": "Disabled",
    "SetPoint": 10
  }
}
```

2> When the value is outside of the allowable range, the modification
fails and an error is reported.
```
curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/json" -X PATCH -d '{ "PowerLimitWatts": {"SetPoint": 4294967296}}' https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics
{
  "error": {
    "@Message.ExtendedInfo": [
      {
        "@odata.type": "#Message.v1_1_1.Message",
        "Message": "The value '4294967296' for the property SetPoint is not in the supported range of acceptable values.",
        "MessageArgs": [
          "4294967296",
          "SetPoint"
        ],
        "MessageId": "Base.1.19.PropertyValueOutOfRange",
        "MessageSeverity": "Warning",
        "Resolution": "Correct the value for the property in the request body and resubmit the request if the operation failed."
      }
    ],
    "code": "Base.1.19.PropertyValueOutOfRange",
    "message": "The value '4294967296' for the property SetPoint is not in the supported range of acceptable values."
  }
}
```

5. PATCH to set ControlMode in PowerLimitWatts

1>When the ControlMode is changed to Automatic, the modification
is successful.
```
curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/json" -X PATCH -d'{ "PowerLimitWatts": {"ControlMode": "Automatic"}}' https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics

curl -k -H "X-Auth-Token: ${token}" -X GET https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics
{
  "@odata.id": "/redfish/v1/Chassis/chassis/EnvironmentMetrics",
  "@odata.type": "#EnvironmentMetrics.v1_3_0.EnvironmentMetrics",
  ...
  "PowerLimitWatts": {
    "AllowableMax": 4294967295,
    "AllowableMin": 0,
    "ControlMode": "Automatic",
    "SetPoint": 10
  }
}
```

2>When the ControlMode is changed to Disabled, the modification
is successful.

```
curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/json" -X PATCH -d'{ "PowerLimitWatts": {"ControlMode": "Disabled"}}' https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics

curl -k -H "X-Auth-Token: ${token}" -X GET https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics
{
  "@odata.id": "/redfish/v1/Chassis/chassis/EnvironmentMetrics",
  "@odata.type": "#EnvironmentMetrics.v1_3_0.EnvironmentMetrics",
  ...
  "PowerLimitWatts": {
    "AllowableMax": 4294967295,
    "AllowableMin": 0,
    "ControlMode": "Disabled",
    "SetPoint": 10
  }
}
```

3>When the ControlMode is changed to other values, the modification
fails and an error is reported.

```
curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/json" -X PATCH -d '{ "PowerLimitWatts": {"ControlMode": "Error"}}' https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics
{
  "error": {
    "@Message.ExtendedInfo": [
      {
        "@odata.type": "#Message.v1_1_1.Message",
        "Message": "The value '\"Error\"' for the property ControlMode is not in the list of acceptable values.",
        "MessageArgs": [
          "\"Error\"",
          "ControlMode"
        ],
        "MessageId": "Base.1.19.PropertyValueNotInList",
        "MessageSeverity": "Warning",
        "Resolution": "Choose a value from the enumeration list that the implementation can support and resubmit the request if the operation failed."
      }
    ],
    "code": "Base.1.19.PropertyValueNotInList",
    "message": "The value '\"Error\"' for the property ControlMode is not in the list of acceptable values."
  }
}
```
6. PATCH to set PowerLimitWatts when no associated object
```
curl -k -H "X-Auth-Token: $token" -H "Content-Type: application/json" -X PATCH -d '{ "PowerLimitWatts":{"SetPoint":0,"ControlMode":"Automatic"}}' https://${bmc}/redfish/v1/Chassis/chassis/EnvironmentMetrics
{
  "error": {
    "@Message.ExtendedInfo": [
      {
        "@odata.type": "#Message.v1_1_1.Message",
        "Message": "The property PowerLimitWatts is not in the list of valid properties for the resource.",
        "MessageArgs": [
          "PowerLimitWatts"
        ],
        "MessageId": "Base.1.19.PropertyUnknown",
        "MessageSeverity": "Warning",
        "Resolution": "Remove the unknown property from the request body and resubmit the request if the operation failed."
      }
    ],
    "code": "Base.1.19.PropertyUnknown",
    "message": "The property PowerLimitWatts is not in the list of valid properties for the resource."
  }
}
```

Change-Id: Iacd244e537ccab6572a0a55b7f30871774e097ff
Signed-off-by: Albert Zhang <zhanghaodi@inspur.com>
Signed-off-by: Janet Adkins <janeta@us.ibm.com>