* Add default description string to vyos_interface
* If `state=up` it should remove the `disable` configuration
for interface. However, if no other interface parameter is configured
this ends up deleting the interface itself which is not the desired
behaviour. Hence adding a default description field to avoid such
scenario's.
* Minor changes
* Add default description to aggregate
* vyos implementation for net_interface module
* vyos_interface implementation module
* vyos_interface integration test
* net_interface integration test for vyos
* Change collection to aggregate
