2.1.15 Should install/uninstall MTAs appropriately

[goniomdq]

This task should install/uninstall the MTAs as required.

[georgenalen]

@goniomdq,
Thanks for raising this issue and submitting a PR. I think I am going to adjust that control a bit differently though. I am going to add a prelim task to capture all installed packages and if postfix or exim are installed it will adjust the configs appropriately based on that finding, no longer via a manually entered var in defaults/main.yml.

Since the control itself doesn't say to install or remove the MTA's I don't think this control should be either. With the way I am going to adjust it, this control will be skipped if either exim or postfix are not installed, which is still in compliance with control 2.1.15. Also if for some reason both are installed it will be bring both instances into compliance for this control, which also will be in compliance.

With these changes I will bring both config edits back into the same task since the format should be one task per control, even if that task contains a single or multiple blocks within it.

The plan is to merge your edits into a staging branch for me adjust 2.1.15 before merging into devel, which will keep you on the contributors for the other additions you have made.

Thanks again for raising issues and contributing to the project. These do really help the product become better.

George

[georgenalen]

Addressed in release 1.3.1