The minimum volume size should be pre-populated
The minimum volume size should be pre-populated

On the create volume modal, the minimum volume size should be
pre-populated when user selects a different image.

Closes-bug: #1615114

Change-Id: I6a0feb376250aacb00270aa5db879dd4a98d6977

openstack/horizon,yeming233/horizon,noironetworks/horizon,openstack/horizon,noironetworks/horizon,ChameleonCloud/horizon,BiznetGIO/horizon,NeCTAR-RC/horizon,NeCTAR-RC/horizon,yeming233/horizon,noironetworks/horizon,BiznetGIO/horizon,BiznetGIO/horizon,NeCTAR-RC/horizon,ChameleonCloud/horizon,noironetworks/horizon,NeCTAR-RC/horizon,ChameleonCloud/horizon,openstack/horizon,openstack/horizon,yeming233/horizon,ChameleonCloud/horizon,BiznetGIO/horizon,yeming233/horizon