refs #3741 fixing some namespaces

core/API/ResponseBuilder.php

core/Access.php

core/Common.php

core/DataTable/Map.php

core/DataTable/Row.php

core/Db.php

core/FrontController.php

core/JqplotDataGenerator.php

core/Plugin/MetadataLoader.php

core/PluginsManager.php

core/ScheduledTime.php

core/ScheduledTime/Daily.php

core/ScheduledTime/Hourly.php

core/ScheduledTime/Monthly.php

core/ScheduledTime/Weekly.php

core/ViewDataTable.php

core/ViewDataTable/HtmlTable/Goals.php

core/ViewDataTable/Properties.php

core/Visualization/Cloud.php

core/Visualization/JqplotGraph.php