Fix TestExecutedOnlyOnceTest by properly setting RunWith

When test contains nested test classes
Both root and nested classes should be annotated with
`@RunWith(JUnit3RunnerWithInners.class)`
to avoid running tests twice

compiler/tests/org/jetbrains/kotlin/test/util/TestExecutedOnlyOnceTest.java

@@ -30,6 +30,7 @@ public class TestExecutedOnlyOnceTest extends TestCase {
         testA = true;
     }
 
+    @RunWith(JUnit3RunnerWithInners.class)
     public static class InnerTest extends TestCase {
         private static boolean testB;
         private static boolean testC;
@@ -44,8 +45,10 @@ public class TestExecutedOnlyOnceTest extends TestCase {
             testC = true;
         }
 
+        @RunWith(JUnit3RunnerWithInners.class)
         public static class InnerInnerTest extends TestCase {
 
+            @RunWith(JUnit3RunnerWithInners.class)
             public static class InnerInnerInnerTest extends TestCase {
                 private static boolean testD;
                 private static boolean testE;