Feature Request: Please allow validations lists to have wildcards

[syyna]

Right now, if you want to validate configurations on a bunch of devices, they need to be specified either on their own yml or in a master yml file. What would be very useful would be to have an option to use wildcards with device names to get a bunch of devices validated with the same dataset.

Example:

Nodes:
  *br*:
     DNS:
         DNS_Servers: [8.8.8.8]

Would cover any devices that are named:

us-sea-br1
us-sea-br2

but wouldn't cover devices that are named:

us-sea-core1
us-sea-access1