Add Generic Openstack cloud provider

[armagankaratosun]

Hello there 👋

This PR adds generic compatibility with (private/public) Openstack clouds, as long as they support application_credentials. I also tried to add some documentation and example configs.

Let me know if anything is missing/needs fixing.

Cheers!

[jacobtomlinson]

Thanks for the effort here! Overall this PR looks great.

I don't have an openstack setup to test this against, but I'm happy to merge it in provided you've verified things work as expected.

As this contribution is a puppy I'd appreciate your commitment to continue maintaining this code and respond to issues and fix bugs in this integration. Are you happy to do that?

[armagankaratosun]

Thanks for the effort here! Overall this PR looks great.

I don't have an openstack setup to test this against, but I'm happy to merge it in provided you've verified things work as expected.

As this contribution is a puppy I'd appreciate your commitment to continue maintaining this code and respond to issues and fix bugs in this integration. Are you happy to do that?

I have tested it against my own openstack installation and verified that it works. Of course openstack installations can vary and i will fix bugs if they emerge.

Sure, i am happy to maintain and respond issues, fix bugs etc in the future.

Cheers

[jacobtomlinson]

Awesome many thanks!