SqlWindowsFirewall: Update unit tests to use the same (newest) unit test template

[johlju]

Details of the scenario you tried and the problem that is occurring

The unit tests for this resource is using an old unit test template.
Suggest we update the unit tests to use the latest unit test template.

https://github.com/PowerShell/DscResources/blob/master/Tests.Template/unit_template.ps1

The DSC configuration that is using the resource (as detailed as possible)

n/a

Version of the operating system and PowerShell the target node is running

n/a

SQL Server edition and version the target node is running

n/a

What SQL Server PowerShell modules, and which version, are present on the target node.

n/a

Version of the DSC module you're using, or write 'dev' if you're using current dev branch

Dev

[TraGicCode]

Can you assign me to this one? @johlju

[johlju]

Great! I labeled it as "in progress". 😄

I sent a feature requests to GitHub Support asking to be able to add any user as an assignee to an issue. They replied that to be able to add a user as an assignee to a issue the user must at least be collaborator with read permission. That will not be possible in this repo, to much administration and I don't have the permission to do that.
They understood the need to being able to add any user as assignee for a public repo. They recorded it as a feature request.