Repair tagmodeltest, which requires these Q_PRIVATE_SLOT declarations

This is a (very) partial revert of commit b5a23bfe ("clazy fixes")

autotests/libs/fakeakonadiservercommand.cpp

@@ -48,13 +48,16 @@ void FakeAkonadiServerCommand::connectForwardingSignals()
     const auto *mo = FakeAkonadiServerCommand::metaObject();
     for (int methodIndex = 0; methodIndex < mo->methodCount(); ++methodIndex) {
         const QMetaMethod mm = mo->method(methodIndex);
-        QByteArray signature = mm.methodSignature();
+        const QByteArray signature = mm.methodSignature();
         if (mm.methodType() == QMetaMethod::Signal) {
             if ((qobject_cast<TagModel*>(m_model) && isTagSignal(signature)) ||
                 (qobject_cast<EntityTreeModel*>(m_model) && (isCollectionSignal(signature) || isItemSignal(signature))))
             {
-                const int modelSlotIndex = m_model->metaObject()->indexOfSlot(signature.remove(0, 5).constData());
-                Q_ASSERT(modelSlotIndex >= 0);
+                const int modelSlotIndex = m_model->metaObject()->indexOfSlot(signature.mid(5).constData());
+                if (modelSlotIndex < 0) {
+                    qWarning() << "Slot not found in" << m_model->metaObject()->className() << ":" << signature.mid(5).constData();
+                    Q_ASSERT(modelSlotIndex >= 0);
+                }
                 mo->connect(this, methodIndex, m_model, modelSlotIndex);
             }
         }

src/core/models/tagmodel.h

@@ -70,6 +70,11 @@ private:
     bool insertColumns(int column, int count, const QModelIndex &index = QModelIndex()) override;
     bool removeColumns(int column, int count, const QModelIndex &index = QModelIndex()) override;
     bool removeRows(int row, int count, const QModelIndex &index = QModelIndex()) override;
+    // Used by FakeAkonadiServerCommand::connectForwardingSignals (tagmodeltest)
+    Q_PRIVATE_SLOT(d_func(), void tagsFetched(const Akonadi::Tag::List &tags))
+    Q_PRIVATE_SLOT(d_func(), void monitoredTagAdded(const Akonadi::Tag &tag))
+    Q_PRIVATE_SLOT(d_func(), void monitoredTagRemoved(const Akonadi::Tag &tag))
+    Q_PRIVATE_SLOT(d_func(), void monitoredTagChanged(const Akonadi::Tag &tag))
 };
 }