Feature/only up ifs

[johannagnarsson]

Pull Request Checklist

Is this in reference to an existing issue? Indirectly, but this would help with this issue, Interface would be omitted from output:

https://github.com/sensu-plugins/sensu-plugins-network-checks/issues/40

General

• [X] Update Changelog following the conventions laid out here

• [ ] Update README with any necessary configuration snippets

• [ ] Binstubs are created if needed

• [ ] RuboCop passes

• [ ] Existing tests pass

New Plugins

• [ ] Tests

• [ ] Add the plugin to the README

• [ ] Does it have a complete header as outlined here

Purpose

To allow the metrics-net script to only display output from network interfaces that are in the 'up' state. Interfaces in any other state will be omitted.

Many of our hosts have dual nics and/or virtual bridge interfaces that will never be in an 'up' state and all of their metrics will be 0. This patch allows simply excluding them from being sent to metric collections.

Known Compatibility Issues

None.

[majormoses]

Oops looks like I made a review but did not hit the sumit button.

[majormoses]

released: https://rubygems.org/gems/sensu-plugins-network-checks/versions/3.2.0