Improve checks on yaml files

[reactive-firewall]

Basic Info

When reporting an issue, please list the version of Python Multicast Library you are using and any relevant information about your software environment:

• Python version:

python3 --version || python --version
2.7-3.14

• OS type

uname -a

• linux
• MacOS (darwin)
• Windows
• <Project> version:

python3 -m pythonrepo.pythonrepo --version

pythonrepo.pythonrepo 1.1.4

Goal

• Improve checks on yaml files with a check via yamllint -f github

• build tool to wrap linter called "check_yml_syntax" located in the directory "Tests"
  • Basic boiler-plate code
  • Map exit codes from linter to our policy as needed
• Create/Update any relevant configurations
• Integrate into CI testing

Next steps

• review and triage the results of the new tool
  • Documentation should consider visibility impacts as PKI during review