Add the 'removed' property to VM volumes (#793)

* Add the 'removed' property to VM volumes

* fix removed location

Author: mattoni

components/schemas/containers/summaries/VolumeSummary.yml

@@ -22,7 +22,7 @@ properties:
             $ref: ../../ID.yml
       - type: "null"
   removed:
-    description: The time stamp of the volume's removal, if applicable.
+    description: The timestamp of the volume's removal, if applicable.
     oneOf:
       - $ref: ../../DateTime.yml
       - type: "null"

components/schemas/vms/VirtualMachineVolume.yml

@@ -11,7 +11,12 @@ properties:
   config:
     $ref: ./config/volumes/VirtualMachineVolumeConfig.yml
     description: The configuration details for the virtual machine's volume.
+  removed:
+    description: The timestamp of the volume's removal, if applicable.
+    oneOf:
+      - $ref: ../DateTime.yml
+      - type: "null"
 required:
   - id
   - hash
-  - config
+  - config