EditorManager: Close documents instead of editors where appropriate

This is the first step in actually making "closeEditor(s)" close editors
instead of documents.

Change-Id: I02761e0cef950b8fc093f65a90df04a9a7550681
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
Reviewed-by: hjk <hjk121@nokiamail.com>

src/plugins/clearcase/clearcaseplugin.cpp

@@ -2364,7 +2364,7 @@ public:
 
     ~TestCase()
     {
-        Core::EditorManager::closeEditor(m_editor, false);
+        Core::EditorManager::closeDocument(m_editor->document(), false);
         QCoreApplication::processEvents(); // process any pending events
 
         QFile file(m_fileName);