Use WcaGetRecordFormattedString to get firewall rule description

[chrisbednarski]

• The column definition for the Description says it's a formatted string, but it was retrieved as a plain string
• fixed a few typos in the comments
• added missing RemoteAddresses and LocalAddresses assert
• added integration test for using formatted properties

[chrisbednarski]

I've updated the failing test to use Environment.GetEnvironmentVariable

And AWS getting in my way, as per usual. Added RemoteAddresses to the firewall rule unique check.

[barnson]

Thanks!