Redfish: Added OCP mandatory properties

- Manager: Added SerialConsole, Links/ManagerForChassis and Links/ManagerForChassis@odata.count
- System: Added Links/Chassis, Links/ManagedBy, Status, BiosVersion
- Power: Added placeholder for PowerControl

Tested:
GET /redfish/v1/Systems/system HTTP/1.1
Response:
{
    "@odata.context": "/redfish/v1/$metadata#ComputerSystem.ComputerSystem",
    "@odata.id": "/redfish/v1/Systems/system",
    "@odata.type": "#ComputerSystem.v1_6_0.ComputerSystem",
    ......
    "BiosVersion": "SE5C620.86B.01.00.0361.120520162351",
    ......
    "Description": "Computer System",
    "Id": "system",
    "IndicatorLED": "Off",
    "Links": {
        "Chassis": [
            {
                "@odata.id": "/redfish/v1/Chassis/R1000_Chassis"
            }
        ],
        "ManagedBy": [
            {
                "@odata.id": "/redfish/v1/Managers/bmc"
            }
        ]
    },
    ......

    "Processors": {
        "@odata.id": "/redfish/v1/Systems/system/Processors"
    },
    "Status": {
        "Health": "OK",
        "State": "Enabled"
    },
    "SystemType": "Physical",
    "UUID": "13876882-7708-4200-bcf2-2c5681218bc8"
}

GET /redfish/v1/Managers/bmc HTTP/1.1
Response:
{
    "@odata.context": "/redfish/v1/$metadata#Manager.Manager",
    "@odata.id": "/redfish/v1/Managers/bmc",
    "@odata.type": "#Manager.v1_3_0.Manager",
    ......
    "Description": "Baseboard Management Controller",
    "Linkn"fces": {
        "@odata.id": "/redfish/v1/Managers/bmc/EthernetInterfaces"
    },
    "FirmwareVersion": "2.7.0-dev-266-g111d297-d14e857",
    "Id": "bmc",
    Links: {
        "ManagerForChassis": [
            {
                "@odata.id": "/redfish/v1/Chassis/R1000_Chassis"
            }
        ],
        "ManagerForChassis@odata.count": 1,
        "ManagerForServers": [
            {
                "@odata.id": "/redfish/v1/Systems/system"
            }
        ],
        "ManagerForServers@odata.count": 1
    },
    ......

    "SerialConsole": {
        "ConnectTypesSupported": [
            "IPMI",
            "SSH"
        ],
        "ServiceEnabled": true
    },
    "Status": {
        "Health": "OK",
        "State": "Enabled"
    },
    "UUID": "067b4e8d-6c29-475c-92a1-6590d4e5818c"
}

GET /redfish/v1/Chassis/R1000_Chassis/Power HTTP/1.1
Response:
{
    "@odata.context": "/redfish/v1/$metadata#Power.Power",
    "@odata.id": "/redfish/v1/Chassis/R1000_Chassis/Power",
    "@odata.type": "#Power.v1_2_1.Power",
    "Id": "Power",
    "Name": "Power",
    "PowerControl": []
}

Signed-off-by: Jennifer Lee <jennifer1.lee@intel.com>
Change-Id: I61d8ba493ad689d7062e1f8bfd26d9a0d80230da
diff --git a/redfish-core/lib/power.hpp b/redfish-core/lib/power.hpp
index b5951d5..07b4b38 100644
--- a/redfish-core/lib/power.hpp
+++ b/redfish-core/lib/power.hpp
@@ -52,6 +52,8 @@
         }
         const std::string& chassis_name = params[0];
 
+        res.jsonValue["PowerControl"] = nlohmann::json::array();
+
         auto sensorAsyncResp = std::make_shared<SensorsAsyncResp>(
             res, chassis_name, typeList, "Power");