Expand the variables available in the VM name

[alpeon]

Description
Currently during the instantiation of a VM you can use %idx in the name pattern. It would be good to extend this and have more variables. For example:

• %grp for primary group of an owner (of course, this is going to be taken into the account only during the instantiation)
• %usr for username of an owner

Might be also good to have something like %hostname if context variable HOSTNAME is set.

Use case
Better naming for deployed VMs

Interface Changes
N/A

Additional Context
N/A

Progress Status

• Code committed
• Testing - QA
• Documentation (Release notes - resolved issues, compatibility, known issues)