SPIGOT-5486: Raider CanJoinRaid

By: md_5 <git@md-5.net>

paper-server/src/main/java/org/bukkit/craftbukkit/entity/CraftRaider.java

@@ -49,4 +49,14 @@ public abstract class CraftRaider extends CraftMonster implements Raider {
     public void setPatrolLeader(boolean leader) {
         getHandle().setPatrolLeader(leader);
     }
+
+    @Override
+    public boolean isCanJoinRaid() {
+        return getHandle().eD();
+    }
+
+    @Override
+    public void setCanJoinRaid(boolean join) {
+        getHandle().u(join);
+    }
 }