Map local guids 6.x -> 4.3.4

Ported the following commits:
https://github.com/TrinityCore/TrinityCore/commit/ca83e14f8b141fab0a13e08f48fca6c1ace0c4c7
https://github.com/TrinityCore/TrinityCore/commit/ee1c1b97be4492ecabe8b15ea6323fc37e4eaa8c
https://github.com/TrinityCore/TrinityCore/commit/18e4ab6911468b829b0fc768e532a770263c3717
https://github.com/TrinityCore/TrinityCore/commit/bf37446b3c2ed73b4d3aa9e227d3eff5c53b378b
https://github.com/TrinityCore/TrinityCore/commit/cb854a2b7bb7bd96cf9c4d1daf3789f797bf4db8

src/server/scripts/Commands/cs_ban.cpp

@@ -318,7 +318,7 @@ public:
             targetGuid = (*resultCharacter)[0].GetUInt32();
         }
         else
-            targetGuid = target->GetGUIDLow();
+            targetGuid = target->GetGUID().GetCounter();
 
         PreparedStatement* stmt = CharacterDatabase.GetPreparedStatement(CHAR_SEL_BANINFO);
         stmt->setUInt32(0, targetGuid);