Campaign Balance fixes

Map Campaigns:

• added debuff to unit survive rolls based on number of battles lost in a row
  
• fixed issues with displaying results of dead general death if unit also destroyed
  
• improvements to AI placement of reinforcement armies
  
• fixes to armies and allies on allies call roll display text
  
• exclude allies, in addition to existing exclusion of armies, reinforcing a battle from adjacent points if they are caught in a siege.
  
• Hard AI rerolls lower value unit selections on reinforcement
  
• fix player able to select second march roll on AI turns
  
• prioritize losing medium and light foot units on attrition rolls on sieges
  
• rebalance reinforcement numbers and cap to AI on hard
  

Misc

• fix Gallic (Middle) description