Do not use worldgen executor for api profile completions

We cannot put blocking network I/O onto the worldgen threads,
this will crash the server if it stalls

patches/server/0283-Fix-SpongeAbsortEvent-handling.patch

@@ -0,0 +1,25 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Shane Freeder <theboyetronic@gmail.com>
+Date: Sat, 10 Nov 2018 05:15:21 +0000
+Subject: [PATCH] Fix SpongeAbsortEvent handling
+
+Only process drops when the block is actually going to be removed
+
+diff --git a/src/main/java/net/minecraft/world/level/block/SpongeBlock.java b/src/main/java/net/minecraft/world/level/block/SpongeBlock.java
+index 8fe119f1ce36ce9ee63a1ba32df0ae8645b6a669..7304b2659eb45bc4bc9fa7c43e6ca07221d0fc73 100644
+--- a/src/main/java/net/minecraft/world/level/block/SpongeBlock.java
++++ b/src/main/java/net/minecraft/world/level/block/SpongeBlock.java
+@@ -129,8 +129,11 @@ public class SpongeBlock extends Block {
+                         // NOP
+                     } else if (material == Material.WATER_PLANT || material == Material.REPLACEABLE_WATER_PLANT) {
+                         BlockEntity tileentity = iblockdata.hasBlockEntity() ? world.getBlockEntity(blockposition2) : null;
+-
+-                        dropResources(iblockdata, world, blockposition2, tileentity);
++                        // Paper start
++                        if (block.getHandle().getMaterial() == Material.AIR) {
++                            dropResources(iblockdata, world, blockposition2, tileentity);
++                        }
++                        // Paper end
+                     }
+                 }
+                 world.setBlock(blockposition2, block.getHandle(), block.getFlag());