move to internal package

Author: zeitlinger

sdk-autoconfigure-support/src/test/java/io/opentelemetry/instrumentation/internal/resources/ResourceProviderPropertiesCustomizerTest.java

@@ -24,6 +24,10 @@
 import org.junit.jupiter.api.DynamicTest;
 import org.junit.jupiter.api.TestFactory;
 
+/**
+ * This class is internal and is hence not for public use. Its APIs are unstable and can change at
+ * any time.
+ */
 public class ResourceProviderPropertiesCustomizerTest {
 
   public static final class Provider implements ResourceProvider {

sdk-autoconfigure-support/src/test/java/io/opentelemetry/instrumentation/internal/thread/AddThreadDetailsSpanProcessorTest.java

@@ -16,6 +16,10 @@
 import io.opentelemetry.semconv.incubating.ThreadIncubatingAttributes;
 import org.junit.jupiter.api.Test;
 
+/**
+ * This class is internal and is hence not for public use. Its APIs are unstable and can change at
+ * any time.
+ */
 class AddThreadDetailsSpanProcessorTest {
 
   private final ReadWriteSpan span = mock(ReadWriteSpan.class);