test: Update topologies and test texts

[mattiaswal]

All mgmt links should be lightgrey, all mgmt ports should be named mgmt links between duts should be named link.

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Tick relevant boxes, this PR is-a or has-a:

• [ ] Bugfix
  • [ ] Regression tests
  • [ ] ChangeLog updates (for next release)
• [ ] Feature
  • [ ] YANG model change => revision updated?
  • [ ] Regression tests added?
  • [ ] ChangeLog updates (for next release)
  • [ ] Documentation added?
• [ ] Code style update (formatting, renaming)
• [ ] Refactoring (please detail in commit messages)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

[troglobit]

Wow, that was quick! Nice work :100:

[mattiaswal]

Great work! See inline comments for proposed fixes - use what you think is useful.

A related note: OSPF multi-area still does not explain 11.0-network in topology or description, but mentioned in one of the test steps. Perhaps a small note in description, saying there are additional networks?

Forgot that! There is now an ASCII-art over loopback configuration.