Add D1 keyword to VSBK (#93)

The keyword is added to back up the UTIL/D1 data to VSBK record.

Signed-off-by: Sunny Srivastava <[email protected]>

Author: SunnySrivastava1984

yaml/com/ibm/ipzvpd/VSBK.interface.yaml

@@ -65,3 +65,7 @@ properties:
       type: array[byte]
       description: >
           F6 keyword.
+    - name: D1
+      type: array[byte]
+      description: >
+          D1 keyword.