I have a specific requirement for VM Naming. VM naming in my data center needs to happen as departmentnameXXXX. XXXX is a four digit code that is assigned in sequence, first VM is 0001, second is 0002 and so on. These are part of individual service catalog requests. I am only provisioning 1 VM per request and not as a bundle. I understand departmentname could come from a vm_prefix using vm_name=changeme in the service dialogue, i am not sure how i can achieve the XXXX.