Micro AIs: use new fight_on_without_leader= key as needed

So that the scenarios with leaderless AI sides work.

data/ai/micro_ais/scenarios/animals.cfg

@@ -55,6 +55,7 @@
         side=2
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=forest
@@ -68,6 +69,7 @@
         side=3
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=ghasts
@@ -81,6 +83,7 @@
         side=4
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=spiders
@@ -94,6 +97,7 @@
         side=5
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=yetis
@@ -107,6 +111,7 @@
         side=6
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=wolves
@@ -120,6 +125,7 @@
         side=7
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=whelps,forest

data/ai/micro_ais/scenarios/bottleneck_defense.cfg

@@ -16,6 +16,7 @@
         controller=ai
         id=LuaAI
         type=Lieutenant
+        fight_on_without_leader=yes
         persistent=no
 
         canrecruit=yes

data/ai/micro_ais/scenarios/wolves.cfg

@@ -34,6 +34,7 @@
         side=2
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=wolves
@@ -47,6 +48,7 @@
         side=3
         controller=ai
         no_leader=yes
+        fight_on_without_leader=yes
         persistent=no
 
         team_name=wolves3