Support for AIX nodes

[stephenulmer]

The roles do not support all platforms supported by Spectrum Scale, specifically AIX.

Describe the solution you'd like
I would like for the roles to support AIX.

Describe alternatives you've considered
For my current project, I will likely have to implement the installation of Spectrum Scale and the creation of a cluster and file system without the benefit of the current roles.

Additional context
Due to time constraints, I don't think I will be able to reverse engineer the existing roles in time to meet my deadlines. I will, however, have time after this project is complete to contribute.

I'd like some direction from the maintainers as to whether they would accept non-Linux contributions, as the last thing I want to do is maintain a fork for my customer.

I would also like some direction as to where the maintainers would prefer I start. For example, it may be harder to start at installing packages because of current assumptions, but it might be easier to add "add a node" support, or you might prefer that work started on a less disruptive tasks.

Thanks for your time.