Relic aura defeat lag

[elexis]

In this svn match we have noticed heavy lag spikes when players were defeated. They are the highest peaks in the replay profile graph.

It took more than 10 to 20 seconds to compute the next turn, despite the affected players having lost only few remaining units.

Adding debug output showed that it is

(1) the Clean call in the Auras component, called from OnPlayerDefeated in this component and (2) only relic entities that cause heavy lag