refactor(Core): Rename ...Manager to ...Mgr (#6910)

* Rename MapManager.h to MapMgr.h

* Rename BanManager.h to BanMgr.h

* Rename MapManager.cpp to MapMgr.cpp

* Rename BanManager.cpp to BanMgr.cpp

* Rename MapRefManager.h to MapRefMgr.h

* Rename ThreatManager.h to ThreatMgr.h

* Rename GridRefManager.h to GridRefMgr.h

* Rename ThreatManager.cpp to ThreatMgr.cpp

* Rename GroupRefManager.h to GroupRefMgr.h

* Rename HostileRefManager.h to HostileRefMgr.h

* Rename HostileRefManager.cpp to HostileRefMgr.cpp

* Rename MMapManager.h to MMapMgr.h

* Rename FollowerRefManager.h to FollowerRefMgr.h

* Rename VMapManager2.h to VMapMgr2.h

* Rename IVMapManager.h to IVMapMgr.h

* Rename MMapManager.cpp to MMapMgr.cpp

* Rename VMapManager2.cpp to VMapMgr2.cpp

* Rename RefManager.h to RefMgr.h

* Rename WaypointManager.h to WaypointMgr.h

* Rename WaypointManager.cpp to WaypointMgr.cpp

* Rename MPQManager.h to MPQMgr.h

* Rename MPQManager.cpp to MPQMgr.cpp

* Rename IMMAPManager.h to IMMAPMgr.h

* fix build

* Update Main.cpp

* chore(Core/Misc): Remove toxic language

* Revert "chore(Core/Misc): Remove toxic language"

* fix build

* build

src/server/game/Groups/GroupRefMgr.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
+ * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
+ * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
+ */
+
+#ifndef _GROUPREFMANAGER
+#define _GROUPREFMANAGER
+
+#include "RefMgr.h"
+
+class Group;
+class Player;
+class GroupReference;
+
+class GroupRefMgr : public RefMgr<Group, Player>
+{
+public:
+    GroupReference* getFirst() { return ((GroupReference*)RefMgr<Group, Player>::getFirst()); }
+    GroupReference const* getFirst() const { return ((GroupReference const*)RefMgr<Group, Player>::getFirst()); }
+};
+#endif