Fix objloader registering at wrong time. Closes #5847. Added test

class as suggested in the issue.

Note: most tests are commented out at the present time, pending
rework. Tests that work, work.

Signed-off-by: cpw <cpw+github@weeksfamily.ca>

src/main/java/net/minecraftforge/client/model/ModelLoaderRegistry.java

@@ -63,7 +63,7 @@ public class ModelLoaderRegistry
     private static IResourceManager manager;
 
     // Forge built-in loaders
-    static
+    public static void init()
     {
         registerLoader(B3DLoader.INSTANCE);
         registerLoader(OBJLoader.INSTANCE);

src/main/java/net/minecraftforge/fml/client/ClientModLoader.java

@@ -27,6 +27,7 @@ import net.minecraft.resources.*;
 import net.minecraftforge.api.distmarker.Dist;
 import net.minecraftforge.api.distmarker.OnlyIn;
 import net.minecraftforge.client.event.ModelRegistryEvent;
+import net.minecraftforge.client.model.ModelLoaderRegistry;
 import net.minecraftforge.common.ForgeConfig;
 import net.minecraftforge.common.MinecraftForge;
 import net.minecraftforge.eventbus.api.Event;
@@ -68,6 +69,7 @@ public class ClientModLoader
         ResourcePackLoader.loadResourcePacks(defaultResourcePacks);
         mcResourceManager.addReloadListener(ClientModLoader::onreload);
         mcResourceManager.addReloadListener(BrandingControl.resourceManagerReloadListener());
+        ModelLoaderRegistry.init();
     }
 
     private static CompletableFuture<Void> onreload(final IFutureReloadListener.IStage stage, final IResourceManager resourceManager, final IProfiler prepareProfiler, final IProfiler executeProfiler, final Executor asyncExecutor, final Executor syncExecutor) {