fixing more namespaces

core/API/DocumentationGenerator.php

core/API/Request.php

core/Access.php

core/Archive.php

core/Archive/DataTableFactory.php

core/AssetManager.php

core/Common.php

core/Controller.php

core/Controller/Admin.php

core/DataTable/Filter/AddColumnsProcessedMetrics.php

core/DataTable/Filter/ExcludeLowPopulation.php

core/DataTable/Renderer/Xml.php

core/EventDispatcher.php

core/ExceptionHandler.php

core/FrontController.php

core/JqplotDataGenerator.php

core/Log.php

core/Log/ErrorScreenFormatter.php

core/Log/Exception.php

core/Log/ExceptionScreenFormatter.php