* Removing obsoleted code from ApiMediaQueryService.cs
* Removing obsoleted code from ApiRichTextMarkupParserTests.cs
* Removing obsoleted code from ContentCacheRefresher.cs
* Removing obsoleted code from ContentFinderByUrlAlias.cs and adjusting its tests to use the new logic
* Removing obsoleted code from ContentFinderByUrl.cs & its dependencies
* Removing obsoleted code from ApiRichTextMarkupParserTests.cs
* Removing obsoleted code from DocumentCache.cs & its dependencies
* Removing obsoleted code from MediaCache.cs & its dependencies
* Removing obsoleted code from PublishedCacheBase.cs & its dependencies
* Removing obsoleted code from RenderNoContentController.cs and its tests
* Removing obsoleted code from UmbracoRouteValueTransformer.cs
* Removing obsoleted constructors from DefaultUrlProvider.cs
* Removing accidental bookmark
* Introducing a helper method to get the root keys in ApiMediaQueryService.cs
* Removing obsoleted code from Cache classes
* Removing unused imports
* Refactoring to meet the CR
* Added attribute to controller
* Fixing missing using statement