Please add VLAN support (int eth eth0 vif 100)

[Harliff]

[tcharewicz]

There is two style of interface configuration, one of them is in the system role and second one is at interface role. This interface role is more extended instead of intefaces at system role and have support for vlans but I'm not quite sure if you can use it with ipsec configuration. I need to make more tests.

Readme for interfaces is here - https://github.com/DreamLab/ansible-vyos/tree/master/roles/interfaces