userportal: fix SD selection on clone VM from template

Fixing storage domain selection when creating a VM
from template using clone allocation.

DisksAllocationModel -> getImageToDestinationDomainMap()
should be passed to AddVmFromTemplateParameters
(for getting user's selected values).

Change-Id: I67e6c4af0ffed01f37bf3c5798654a250e45a018
Bug-Url: https://bugzilla.redhat.com/928410
Signed-off-by: Daniel Erez <derez@redhat.com>