RHEL Server Licensing for VM's

Linux experience: moderate
RHEL experience: minimal
Issue:
I have to test my device driver on 6.4, 6.5, 7.*, for both x86 & x64. I'll be creating VM's for these instances and plan to cycle thru (start/test/stop) the list in an automated fashion. I was intending to do this with 1 RedHat license but I don't see how that could possibly work. The RHN Classic subscription is by system name and it's associated channel.
I was going to use system names like:
rhel64x86
rhel64x64
rhel65x86
rhel65x64
....

My current assumption: I have to register a VM as I would any RHEL system in order to get updates.

Would some one share the technique or logic required to accomplish this with 1 license?
Thanks in advance for your time.