Block minecart portal teleports in some instances

Mitigates GH-373
Technically a workaround rather than a true fix

Spigot-Server-Patches/0155-Make-entities-look-for-hoppers.patch

@@ -1,4 +1,4 @@
-From c87534e092cff7992c0f4e96f9c6f2567cea4fd4 Mon Sep 17 00:00:00 2001
+From f4c96964d2f893ecac513c8759c888a36395424d Mon Sep 17 00:00:00 2001
 From: Techcable <Techcable@outlook.com>
 Date: Sat, 18 Jun 2016 01:01:37 -0500
 Subject: [PATCH] Make entities look for hoppers
@@ -103,6 +103,18 @@ index 8c64279..4445ae7 100644
      public boolean b(AxisAlignedBB axisalignedbb) {
          return this.a(axisalignedbb.a, axisalignedbb.b, axisalignedbb.c, axisalignedbb.d, axisalignedbb.e, axisalignedbb.f);
      }
+diff --git a/src/main/java/net/minecraft/server/BlockPortal.java b/src/main/java/net/minecraft/server/BlockPortal.java
+index 88d267c..803019a 100644
+--- a/src/main/java/net/minecraft/server/BlockPortal.java
++++ b/src/main/java/net/minecraft/server/BlockPortal.java
+@@ -114,6 +114,7 @@ public class BlockPortal extends BlockHalfTransparent {
+ 
+     public void a(World world, BlockPosition blockposition, IBlockData iblockdata, Entity entity) {
+         if (!entity.isPassenger() && !entity.isVehicle() && entity.aX()) {
++            if (entity.getWorld().paperConfig.isHopperPushBased && entity instanceof EntityMinecartAbstract) return; // Paper - Mitigates GH-373
+             // CraftBukkit start - Entity in portal
+             EntityPortalEnterEvent event = new EntityPortalEnterEvent(entity.getBukkitEntity(), new org.bukkit.Location(world.getWorld(), blockposition.getX(), blockposition.getY(), blockposition.getZ()));
+             world.getServer().getPluginManager().callEvent(event);
 diff --git a/src/main/java/net/minecraft/server/BlockPosition.java b/src/main/java/net/minecraft/server/BlockPosition.java
 index d6cc51b..5bbaa87 100644
 --- a/src/main/java/net/minecraft/server/BlockPosition.java