mostly core and analyzer: more id-fication

Change-Id: Ic794fdc6a582f4a03d84b6220c59111044c753b9
Reviewed-by: hjk <qthjk@ovi.com>

src/plugins/valgrind/callgrindtool.h

@@ -48,7 +48,7 @@ public:
     CallgrindTool(QObject *parent);
     ~CallgrindTool();
 
-    QByteArray id() const;
+    Core::Id id() const;
     QString displayName() const;
     QString description() const;
     ToolMode toolMode() const;