Git: Modernize

* Use auto
* Use override
* Use some member initializers

Change-Id: I3ca000d1c8e4d02331d58b85e68e4d771c636b29
Reviewed-by: André Hartmann <aha_1980@gmx.de>

src/plugins/git/gerrit/gerritplugin.h

@@ -53,7 +53,7 @@ class GerritPlugin : public QObject
     Q_OBJECT
 public:
     explicit GerritPlugin(QObject *parent = nullptr);
-    ~GerritPlugin();
+    ~GerritPlugin() override;
 
     bool initialize(Core::ActionContainer *ac);