Use correct Supplier interface (1.7.10)

It works on modern since
com.google.common.base.Supplier implements
java.util.function.Supplier
but that is not guaranteed

core/src/main/java/com/seibel/distanthorizons/core/render/LodRenderSection.java

@@ -19,6 +19,7 @@
 
 package com.seibel.distanthorizons.core.render;
 
+import com.google.common.base.Supplier;
 import com.google.common.base.Suppliers;
 import com.google.common.cache.Cache;
 import com.seibel.distanthorizons.api.interfaces.render.IDhApiRenderableBoxGroup;
@@ -60,7 +61,6 @@ import java.util.List;
 import java.util.concurrent.*;
 import java.util.concurrent.atomic.AtomicInteger;
 import java.util.concurrent.locks.ReentrantLock;
-import java.util.function.Supplier;
 
 /**
  * A render section represents an area that could be rendered.