ADDomainController: Test method does not check all values

Test-TargetResource has some issues.

• It does not look for properties SysvolPath, LogPath and DatabasePath
• It throws an exception if the site name is wrong instead of returning a bool

1. Provided a non-existing path still returns true

Test-TargetResource -DomainName contoso.com -DomainAdministratorCredential $cred -SafemodeAdministratorPassword $cred -DatabasePath C:\WrongPath -SiteName Default-First-Site-Name
True

2. Providing a non-existing site throws an exception and does not return a bool

Test-TargetResource -DomainName contoso.com -DomainAdministratorCredential $cred -SafemodeAdministratorPassword $cred -DatabasePath C:\WrongPath -SiteName WrongSite
Site 'WrongSite' could not be found.
At line:196 char:13
+             throw (New-Object -TypeName System.InvalidOperationExcept ...
+             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    + CategoryInfo          : OperationStopped: (:) [], InvalidOperationException
    + FullyQualifiedErrorId : Site 'WrongSite' could not be found.

Start with the AD domain controller resource's Test-TargetResource method and reproduce the two PowerShell examples from the issue. Trace how SysvolPath, LogPath, DatabasePath, and SiteName are evaluated. Done means the method checks all three paths and returns a Boolean for a missing site instead of throwing an exception.