title: Using WixIIsExtension and localization variable errors on building localized installer
body: <p>When using the WixIIsExtension for WiX MSI project, for building localized installer (ru-RU culture, for example), I got a lot of such errors:</p>
  
  <ul>
  <li>the localization variable (loc.configureiis) is unknown. please ensure the variable is defined</li>
  </ul>
  
  <p>I have the workaround for it - installing IIS application is organized as separate merge module without localizations. When I build WiX MergeModule project with using WixIIsExtension - it's OK.</p>
  
  <p>But what is the reason of errors inside MSI project? Would it be fixed in later versions of WiX?</p>