Volumes - Not displaying the UUID of the image that is currently attached

[arturonuman]

Steps to reproduce it:

• Log into ciao-webui
• Make sure there's at least one image available
• Create a non-bootable volume
• Attach the recently attached volume to an image

Expected Behaviour:
The volume should display the UUID of the image that is attached to in the 'Attached to' column.

Actual Behaviour:
The volume displays 'None' in the 'Attached to' column.