Use singleton in Village class to work around null issue that evades

Spigot-Server-Patches/0093-Pass-world-to-Village-creation.patch

@@ -1,4 +1,4 @@
-From 04fd8f7d4f3cd1c3351ef21c0c6b17108f9db68a Mon Sep 17 00:00:00 2001
+From 7ff983308b59dcb1c547aff7950be49305211165 Mon Sep 17 00:00:00 2001
 From: Aikar <aikar@aikar.co>
 Date: Sat, 19 Mar 2016 15:16:54 -0400
 Subject: [PATCH] Pass world to Village creation
@@ -19,7 +19,7 @@ index 107f582..140b14b 100644
              village.a(nbttagcompound1);
              this.villages.add(village);
 diff --git a/src/main/java/net/minecraft/server/Village.java b/src/main/java/net/minecraft/server/Village.java
-index 932eeb7..9b59dcb 100644
+index 932eeb7..06a06ea 100644
 --- a/src/main/java/net/minecraft/server/Village.java
 +++ b/src/main/java/net/minecraft/server/Village.java
 @@ -22,7 +22,7 @@ public class Village {
@@ -31,6 +31,15 @@ index 932eeb7..9b59dcb 100644
          this.c = BlockPosition.ZERO;
          this.d = BlockPosition.ZERO;
          this.j = new TreeMap();
--- 
-2.7.4
+@@ -391,7 +391,7 @@ public class Village {
+             NBTTagCompound nbttagcompound2 = nbttaglist1.get(j);
+ 
+             if (nbttagcompound2.hasKey("UUID")) {
+-                UserCache usercache = this.a.getMinecraftServer().getUserCache();
++                UserCache usercache = MinecraftServer.getServer().getUserCache(); // Paper - Bandaid for world being null
+                 GameProfile gameprofile = usercache.a(UUID.fromString(nbttagcompound2.getString("UUID")));
+ 
+                 if (gameprofile != null) {
+-- 
+2.7.3