Feedback: Add docs on Ansible playbooks to automate Landscape install

[rathbunr]

Consider the addition of Ansible playbooks to automation the installation of Ubuntu Landscape

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Reported from: https://documentation.ubuntu.com/landscape/how-to-guides/external-authentication/active-directory/

[YanisaHS]

We've added a document that compares Landscape and Ansible - Related tools: Landscape and Ansible

It doesn't cover the Ansible-specific instructions to automate installing Landscape, but just providing this context for anyone who sees this issue in the future.