Chassis: fix ResetActionInfo

There is a regression that "Parameters" in ActionInfo now become an
object rather than an array, as defined in the Schema,
https://redfish.dmtf.org/schemas/ActionInfo.v1_2_0.json

Tested:
1. On my mock environment,
{
    "@odata.id": "/redfish/v1/Chassis/fake_chassis/ResetActionInfo",
    "@odata.type": "#ActionInfo.v1_1_2.ActionInfo",
    "Id": "ResetActionInfo",
    "Name": "Reset Action Info",
    "Parameters": [
        {
            "AllowableValues": [
                "PowerCycle"
            ],
            "DataType": "String",
            "Name": "ResetType",
            "Required": true
        }
    ]
}
2. Redfish Service Validator passes
```
*** /redfish/v1/Chassis/fake_chassis/ResetActionInfo
Attempt 1 of /redfish/v1/Chassis/fake_chassis/ResetActionInfo
Response Time for GET to /redfish/v1/Chassis/fake_chassis/ResetActionInfo: 0.0017544100992381573 seconds.
	 Type (ActionInfo.v1_1_2.ActionInfo), GET SUCCESS (time: 0:00:00.001957)
	 PASS
```

Signed-off-by: Nan Zhou <nanzhoumails@gmail.com>
Change-Id: I85d1c14d6a37b6f360732ee107d0163c2d3ff15f
Signed-off-by: Ed Tanous <edtanous@google.com>
diff --git a/redfish-core/lib/chassis.hpp b/redfish-core/lib/chassis.hpp
index 181ef3d..f92a7d8 100644
--- a/redfish-core/lib/chassis.hpp
+++ b/redfish-core/lib/chassis.hpp
@@ -698,13 +698,16 @@
         asyncResp->res.jsonValue["Name"] = "Reset Action Info";
 
         asyncResp->res.jsonValue["Id"] = "ResetActionInfo";
-        nlohmann::json::object_t parameters;
-        parameters["Name"] = "ResetType";
-        parameters["Required"] = true;
-        parameters["DataType"] = "String";
+        nlohmann::json::array_t parameters;
+        nlohmann::json::object_t parameter;
+        parameter["Name"] = "ResetType";
+        parameter["Required"] = true;
+        parameter["DataType"] = "String";
         nlohmann::json::array_t allowed;
         allowed.push_back("PowerCycle");
-        parameters["AllowableValues"] = std::move(allowed);
+        parameter["AllowableValues"] = std::move(allowed);
+        parameters.push_back(std::move(parameter));
+
         asyncResp->res.jsonValue["Parameters"] = std::move(parameters);
         });
 }