drive: cleanup recent errors

There were two new errors found the drives implementation that was
recently implemented.

Tested:

wget -qO- http://localhost:80/redfish/v1/Chassis/DC_SCM/Drives
{
  "@odata.id": "/redfish/v1/Chassis/DC_SCM/Drives",
  "@odata.type": "#DriveCollection.DriveCollection",
  "Members": [
    {
      "@odata.id": "/redfish/v1/Chassis/DC_SCM/Drives/mmcblk0"
    }
  ],
  "Members@odata.count": 1,
  "Name": "Drive Collection"
}

wget -qO- http://localhost:80/redfish/v1/Chassis/DC_SCM/Drives/mmcblk0
{
  "@odata.id": "/redfish/v1/Chassis/DC_SCM/Drives/mmcblk0",
  "CapacityBytes": 15634268160,
  "Id": "mmcblk0",
  "Links": {
    "Chassis": "Enabled"
  },
  "Name": "mmcblk0",
  "Status": {
    "State": "Enabled"
  }
}

Tested:
Redfish Validator Passed now.

Old Validator Failure
```
*** /redfish/v1/Chassis/chassis_0/Drives/drive_0
WARNING - /redfish/v1/Chassis/chassis_0/Drives/drive_0 @odata.id: Expected @odata.id to match URI link /redfish/v1/Chassis/Drives/drive_0
ERROR - URI /redfish/v1/Chassis/Drives/drive_0 does not match the following required URIs in Schema of Drive.v1_7_0.Drive
INFO - 	 Type (Drive.v1_7_0.Drive), GET SUCCESS (time: 0:00:00.072884)
INFO - Attempt 1 of /redfish/v1/Chassis/chassis_0
INFO - Response Time for GET to /redfish/v1/Chassis/chassis_0: 0.253246079897508 seconds.
INFO - 	  FAIL...
INFO - Metadata: Namespaces missing from $metadata: set()
INFO -
```

Current Output,
```
{
  "@odata.id": "/redfish/v1/Chassis/chassis_0/Drives/drive_0",
  "@odata.type": "#Drive.v1_7_0.Drive",
  "Id": "drive_0",
  "Links": {
    "Chassis": {
      "@odata.id": "/redfish/v1/Chassis/chassis_0"
    }
  },
  ...
}
```

Change-Id: I1af7704070dbf43c4e8b7768a052a2be4446b54c
Signed-off-by: John Edward Broadbent <jebr@google.com>
diff --git a/redfish-core/lib/chassis.hpp b/redfish-core/lib/chassis.hpp
index f1de38c..d6f9321 100644
--- a/redfish-core/lib/chassis.hpp
+++ b/redfish-core/lib/chassis.hpp
@@ -291,7 +291,7 @@
                 }
 
                 nlohmann::json reference;
-                reference["odata.id"] = crow::utility::urlFromPieces(
+                reference["@odata.id"] = crow::utility::urlFromPieces(
                     "redfish", "v1", "Chassis", chassisId, "Drives");
                 asyncResp->res.jsonValue["Drives"] = std::move(reference);
                 });