Fix farm animals so they don't get into combat state

mods/ENTITIES/mobs_mc/chicken.lua

@@ -12,13 +12,13 @@ mcl_mobs.register_mob("mobs_mc:chicken", {
 	description = S("Chicken"),
 	type = "animal",
 	spawn_class = "passive",
-
+	passive = true,
+	runaway = true,
 	hp_min = 4,
 	hp_max = 4,
 	xp_min = 1,
 	xp_max = 3,
 	collisionbox = {-0.2, -0.01, -0.2, 0.2, 0.69, 0.2},
-	runaway = true,
 	floats = 1,
 	head_swivel = "head.control",
 	bone_eye_height = 4,

mods/ENTITIES/mobs_mc/cow+mooshroom.lua

@@ -7,6 +7,7 @@ local cow_def = {
 	type = "animal",
 	spawn_class = "passive",
 	passive = true,
+	runaway = true,
 	hp_min = 10,
 	hp_max = 10,
 	xp_min = 1,
@@ -40,7 +41,6 @@ local cow_def = {
 		max = 2,
 		looting = "common",},
 	},
-	runaway = true,
 	sounds = {
 		random = "mobs_mc_cow",
 		damage = "mobs_mc_cow_hurt",

mods/ENTITIES/mobs_mc/pig.lua

@@ -6,6 +6,7 @@ mcl_mobs.register_mob("mobs_mc:pig", {
 	description = S("Pig"),
 	type = "animal",
 	spawn_class = "passive",
+	passive = true,
 	runaway = true,
 	hp_min = 10,
 	hp_max = 10,

mods/ENTITIES/mobs_mc/sheep.lua

@@ -56,6 +56,7 @@ mcl_mobs.register_mob("mobs_mc:sheep", {
 	description = S("Sheep"),
 	type = "animal",
 	spawn_class = "passive",
+	passive = true,
 	hp_min = 8,
 	hp_max = 8,
 	xp_min = 1,