Core/Threads: Include Helgrind suppressions file

Include a Helgrind suppressions file under source control. Each suppressed race is either a false positive, a read race followed by a lock acquire anyway, a bool race. Suppressions related to the same issue in the same function are grouped with a counter in brackets [ ] .

Fix tabs added in bcee801e4bdbf7d53f15cd0499e9d3aaedd3c3e2 .
DB/Misc: Typo fix for Defiling Uther's Tomb

by dr-j, closes #11180
Core/CreatureGroups: Add fields to creature_formations and code to prevent creature crossover in formations.
Wiki update and db values too follow.
DB/Creature_formations: Update a few formations to not crossover at pathing endpoints.
RBAC: Move initial log output in AccountMgr::LoadRBAC to debug
Core/SmartAI: Better wording for telling "There is a spell for summoning this"
DB: Fix start up warnings
Core/Logging: Extend logging system to allow inheritance of loggers
- Changed default loggers and appenders
- '.' determines the relation between loggers ("type.subtype" inherits "type" logger setting if logger "type.subtype" is not defined)
- When core logs a message it search for the correct logger (root is the default one)
  ie: a message logged with "type.subtype"
  * Core will try to find a logger with name "type.subtype", if its not found then will search for "type", again if its not found it will return the default one "root"
Merge https://github.com/TrinityCore/TrinityCore