feature(travis-ci): add basic test to identify issues with configs

[dgibbs64]

Description

added new WIP unit test to confirm config files are correct. Currently, only checks settings and comments that are present in all config files are correct. This will need to be developed more but is a good start

Fixes #[issue]

Type of change

• Bug fix (change which fixes an issue).
• New feature (change which adds functionality).
• New Server (new server added).
• Refactor (restructures existing code).
• Comment update (typo, spelling, explanation, examples, etc).

Checklist

PR will not be merged until all steps are complete.

• This pull request links to an issue.
• This pull request uses the develop branch as its base.
• This code follows the style guidelines of this project.
• I have performed a self-review of my own code.
• I have checked that this code is commented where required.
• I have provided a detailed enough description of this PR.
• I have checked If documentation needs updating.

Documentation

If documentation does need updating either update it by creating a PR (preferred) or request a documentation update.

• User docs: https://github.com/GameServerManagers/LinuxGSM-Docs
• Dev docs: https://github.com/GameServerManagers/LinuxGSM-Dev-Docs

Thank you for your Pull Request!