move instance method with method ref: ensure qualifier is not deleted

IDEA-181919

java/java-tests/testData/refactoring/moveInstanceMethod/MethodReferenceWithThisTarget.java.after

@@ -0,0 +1,13 @@
+import java.util.function.Consumer;
+
+class Source {
+}
+
+class Destination {
+  public void doSomething(String s) {
+  }
+
+    public void foo() {
+      Consumer<String> doSomething = this::doSomething;
+    }
+}