Add ability to customize default operating system support for new/converted modules

[scotje]

Users should be able to customize what the default operating system support is for new and newly converted modules. Currently, the pre-selected options are hard-coded.

Futher, the solution should support customizing the operating system versions that are included in the generated metadata.json.

For example, currently if you select "RedHat based Linux" in the interview process, it adds the following entry to metadata.json:

{
      "operatingsystem": "RedHat",
      "operatingsystemrelease": [
        "8"
      ]
}

It would be useful to be able to customize the contents of the operatingsystemrelease array. (For example, set it to ["5", "6", "7"] or ["6", "7", "8"].