Add test from i19007

Author: EugeneFlesselle

tests/pos/i19007/MyRunConfigurationScala.scala

@@ -0,0 +1,2 @@
+
+class MyRunConfigurationScala extends RunConfigurationBase

tests/pos/i19007/RunConfiguration.java

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+
+public interface RunConfiguration extends Cloneable {
+    RunConfiguration clone();
+}

tests/pos/i19007/RunConfigurationBase.java

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+public abstract class RunConfigurationBase<T> extends UserDataHolderBase implements RunConfiguration {
+  @Override
+  public RunConfiguration clone() {
+    return null;
+  }
+}

tests/pos/i19007/UserDataHolderBase.java

@@ -0,0 +1,8 @@
+import java.util.concurrent.atomic.AtomicReference;
+
+public class UserDataHolderBase extends AtomicReference<String> {
+  @Override
+  protected Object clone() {
+    return null;
+  }
+}