Fixes anchor rendering (#2698)

* Fixes #2680: Use a shorter cable anchor model when blocked by a facade.
* Fixes #2664: Prevent anchors from creating intersection.

Replaced the simple List<ResourceLocation> for the static models with a
new container also indicating a solid part, which can be used to prevent
the creation of an intersection.

src/main/java/appeng/parts/CableBusContainer.java

@@ -25,6 +25,7 @@ import java.util.LinkedList;
 import java.util.List;
 import java.util.Random;
 import java.util.Set;
+
 import javax.annotation.Nullable;
 
 import io.netty.buffer.ByteBuf;