Added some example playbooks

[Tronde]

IMHO it's useful to have some example playbooks for common use cases that are easy to adapt by copy, paste, and modify.

I like it when roles have an example direktory with some playbooks in it, because it saves time when I don't have to search a long README.md for some examples.

With this PR I would like to contribute some example playbooks for the firewall role. I chose some use cases I encountered in different enviroments.

Signed-off-by: Joerg Kastning jkastning@my-it-brain.de

[richm]

one minor nit, otherwise, lgtm

[coveralls]

Pull Request Test Coverage Report for Build 3636396836

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 52.919%

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Totals
Change from base Build 3569035399:	0.0%
Covered Lines:	417
Relevant Lines:	788

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💛 - Coveralls

[coveralls]

Pull Request Test Coverage Report for Build 3610185788

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 52.919%

---

Totals
Change from base Build 3569035399:	0.0%
Covered Lines:	417
Relevant Lines:	788

---

💛 - Coveralls

[Tronde]

Thanks for checking the PR. I fixed the name of the task in example/disable-cockpit-and-dhcpv6-client.yml as well as a yamllint error found by the tox check.

[Tronde]

Sorry, I missed that second issue with the missing space. I'll do better next time by trying to use the tools at hand in a proper way. As far as I could see I hope to have catched all yamllint issues and tox shoudn't find any others. Thanks for your patience.

[richm]

Sorry, I missed that second issue with the missing space. I'll do better next time by trying to use the tools at hand in a proper way. As far as I could see I hope to have catched all yamllint issues and tox shoudn't find any others. Thanks for your patience.

Thank you for the PR!