[9763] Use min/max BG/arena levels from DBC. Update table content.

[newsbot]

<pre>m sql/mangos.sql
+ sql/updates/9763_01_mangos_battleground_template.sql
m sql/updates/Makefile.am
m src/game/BattleGroundMgr.cpp
m src/game/DBCStructure.h
m src/game/DBCfmt.h
m src/shared/revision_nr.h
m src/shared/revision_sql.h

[9763] Use min/max BG/arena levels from DBC. Update table content.

* Use min/mac level from dbc because anyway list real selectable
for player level bg/arena backets set min/max range.
* Drop related fields and update per team min/max values.</pre>



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