webadmin: Add vm name to quota message

When a VM was created with no quota in an audit/enforcing
DC  (using REST for instance), the error message did not
include the name of the offending vm

Change-Id: I5a55b549f0127fde8b0afd6daae2ac06e0218e3d
Bug-Url: https://bugzilla.redhat.com/949576
Signed-off-by: Noam Slomianko <nslomian@redhat.com>