fix last ally index (for multiple play)

[VJubert]

With U-Wing, Darth Vader or Endless Legion, if you play multiple unit, LastAllyIndex is incorrect while you resolve unit's ability. Fix it with uniqueID.

Involved units :

• Redemption
• Vanguard Ace
• Guerrilla Attack Pod
• The Ghost
• Imperial Interceptor
• Count Dooku
• TIE Advanced
• Wing Leader
• Fett's Firespray
• Mandalorian Warrior
• Outland TIE Vanguard
• Krrsantan
• Discerning Veteran
• Xanadu Blood
• Wild Rancor
• Chewbaca Pikesbane
• Trandoshan Hunters
• Jabba's Rancor