Minor improvments on logs, stats weights and aoe distance calculation (#995)

* StatsCollector for paladin spell

* Remove error log on MoveFromGroup

* Log and timer for CreateRandomBots

* Improve aoe trigger distance calculation

* Reduce spirit weights for heal priest and paladin

src/strategy/triggers/GenericTriggers.cpp

@@ -228,8 +228,7 @@ bool AoeTrigger::IsActive()
         Unit* unit = botAI->GetUnit(guid);
         if (!unit || !unit->IsAlive())
             continue;
-
-        if (unit->GetExactDist2d(current_target) <= range)
+        if (unit->GetDistance(current_target->GetPosition()) <= range)
         {
             attackers_count++;
         }