Core/Pets: corrected formulars for minion and pet damage values for good this time

* data is based on dr. damage and simulationcraft

src/server/game/Entities/Unit/StatSystem.cpp

@@ -1148,7 +1148,7 @@ void Guardian::UpdateDamagePhysical(WeaponAttackType attType)
 
 void Guardian::SetBonusDamage(int32 damage)
 {
-    m_bonusSpellDamage = damage;
+    //m_bonusSpellDamage = damage;
     if (GetOwner()->GetTypeId() == TYPEID_PLAYER)
         GetOwner()->SetUInt32Value(PLAYER_PET_SPELL_POWER, damage);
 }