refactor(Core): apply clang-tidy modernize-use-override (#3817)

src/server/game/Server/WorldSession.h

@@ -133,11 +133,11 @@ class MapSessionFilter : public PacketFilter
 {
 public:
     explicit MapSessionFilter(WorldSession* pSession) : PacketFilter(pSession) {}
-    ~MapSessionFilter() {}
+    ~MapSessionFilter() override {}
 
-    virtual bool Process(WorldPacket* packet);
+    bool Process(WorldPacket* packet) override;
     //in Map::Update() we do not process player logout!
-    virtual bool ProcessLogout() const { return false; }
+    bool ProcessLogout() const override { return false; }
 };
 
 //class used to filer only thread-unsafe packets from queue
@@ -146,9 +146,9 @@ class WorldSessionFilter : public PacketFilter
 {
 public:
     explicit WorldSessionFilter(WorldSession* pSession) : PacketFilter(pSession) {}
-    ~WorldSessionFilter() {}
+    ~WorldSessionFilter() override {}
 
-    virtual bool Process(WorldPacket* packet);
+    bool Process(WorldPacket* packet) override;
 };
 
 // Proxy structure to contain data passed to callback function,

src/server/game/Server/WorldSocketMgr.cpp

@@ -68,7 +68,7 @@ public:
         m_Reactor = new ACE_Reactor (imp, 1);
     }
 
-    virtual ~ReactorRunnable()
+    ~ReactorRunnable() override
     {
         Stop();
         Wait();
@@ -142,7 +142,7 @@ protected:
         m_NewSockets.clear();
     }
 
-    virtual int svc()
+    int svc() override
     {
 #if defined(ENABLE_EXTRAS) && defined(ENABLE_EXTRA_LOGS)
         sLog->outStaticDebug ("Network Thread Starting");