Fix arista_eos sh ip bgp for PfxAdv column

[itsMrRobot]

Encountered PfxAdv option when working on Lab cEOS devices running 4.34.2F-43232954.4342F, added line 21 to account for that field as previous version encountered error without it

CLI output from device:

Error received without line:

Results after adding line to local template file:

[mjbear]

Hi @itsMrRobot!

1. Test data needs to be added so CI tests can run against this template to validate it works now and in the future. There are helper scripts to help with generating the structured test data from the raw CLI output.

Here are some tips on the development environment

Thank you!

[mjbear]

@itsMrRobot
Please visit the PR on GitHub to review my guidance from two weeks ago (9/6).

If there are questions, please respond on the PR here.
Thank you!

[mjbear]

@itsMrRobot
Please review the September 6 requested changes.
If you have any questions, please respond back. We're here to assist.