image_id field added to Volume

interface/storage/Volume.py

@@ -4,6 +4,7 @@ import json
 class Volume:
     def __init__(self,
                  id,
+                 image_id,
                  size,
                  bootable,
                  status,
@@ -12,6 +13,7 @@ class Volume:
         super().__init__()
 
         self.id = id
+        self.image_id = image_id
         self.size = size
         self.bootable = bootable
         self.status = status