Allow specifying minimum VLAN group size when using `vlan.vlanlist_to_config`.

[progala]

Environment

• netutils version: v1.0.0

Proposed Functionality

Allow specifying minimum VLAN group size when using vlan.vlanlist_to_config.

Currently vlanlist_to_config will not group together two adjecent VLANs. Only groups of 3 or more VLANs are considered for vlan_a-vlan_x format conversion.

Proposal is to add min_group_size argument that would allow caller to control the grouping behavior.

Use Case

As an end user I want to be able to affect the way VLANs in the VLAN list are grouped. Some vendors, in their configuration, group two adjecent VLANs using - between the VLAN ids.

For example VLANs 4,5 would be represented as 4-5.

Example output from the Arista EOS illustrating this use case:

nyc-leaf-01#sh run | in vlan
vlan 4-5,9-10,15,20,30

[itdependsnetworks]

Makes sense!

[jeffkala]

should this be configurable? Wondering if different s/w versions do this based on a different min adjacent vlans?

[jeffkala]

fixed in #105