extract method with folded parameter: resolve names conflict (IDEA-156943)

java/java-tests/testData/refactoring/extractMethod/FoldedWithConflictedNames.java

@@ -0,0 +1,12 @@
+class Test {
+  void bar() {
+    int size = 10;
+    int array[] = new int[size];
+    int array2[] = new int[size];
+
+    int i = 0;
+
+    <selection>int sum = array[i];
+    sum += array2[i];</selection>
+  }
+}