use the sync_instance library for tests too

bindings/java/core/src/test/java/org/videolan/jvlc/internal/LibVlcCoreTest.java

@@ -34,7 +34,7 @@ import org.videolan.jvlc.internal.LibVlc.libvlc_exception_t;
 public class LibVlcCoreTest
 {
 
-    private LibVlc instance = LibVlc.INSTANCE;
+    private LibVlc instance = LibVlc.SYNC_INSTANCE;
     
     @Test
     public void testNew() throws Exception

bindings/java/core/src/test/java/org/videolan/jvlc/internal/MediaListTest.java

@@ -39,7 +39,7 @@ import org.videolan.jvlc.internal.LibVlc.libvlc_exception_t;
 public class MediaListTest
 {
 
-    private LibVlc libvlc = LibVlc.INSTANCE;
+    private LibVlc libvlc = LibVlc.SYNC_INSTANCE;
 
     private LibVlcInstance libvlcInstance;