[12255] Update battleground code to cata.

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Автор: Yaki Khadafi


<pre>m src/game/BattleGround/BattleGround.cpp
m src/game/BattleGround/BattleGround.h
m src/game/BattleGround/BattleGroundHandler.cpp
m src/game/BattleGround/BattleGroundMgr.cpp
m src/game/BattleGround/BattleGroundMgr.h
m src/game/Group.cpp
m src/game/ObjectGuid.cpp
m src/game/ObjectGuid.h
m src/game/Opcodes.cpp
m src/game/Opcodes.h
m src/shared/revision_nr.h
</pre>
<pre style='white-space:pre-wrap;width:81ex'>[12255] Update battleground code to cata.
TODO: update arenas
Thx @Tuxity for base research

Signed-off-by: Yaki Khadafi <elsoldollo@gmail.com></pre>


Подробнее... (https://github.com/mangos/server/commit/abfc99ef522b8b6353d051a002d026530ec7d253)