Cleanup server startup log:

* Source: Wyrmcaller Vile / Howling Fjord | by FireEmerald
* Source: DB/Instance: Update: Delete all non attackable npc's in Drak'Tharon Keep | by Torrad
* DB/Creature: Update: Correct spawnchance of some rare NPC's in Northend | by FireEmerald
* DB/Instance: Update: Corrected Emblems of Heroism & Triumph in Halls of Stone | by FireEmerald
* DB/Battleground: Fix: Buff Honorable Defender in Arathi Basin, Eye of the Storm and Isle of Conquest when you defeat a Base | by Torrad
* DB/NPC: Add: Arena MMR Master (resett) and Top 5 Killers | by Torrad
* Delete Custom/npc_shop.cpp | by Torrad