Migrate kotlin sources, maven projects and stdlib to new lambda syntax

libraries/stdlib/test/js/javautilCollectionsTest.kt

@@ -12,7 +12,7 @@ class JavautilCollectionsTest {
     val TEST_LIST = array(2, 0, 9, 7, 1).toList()
     val SORTED_TEST_LIST = array(0, 1, 2, 7, 9).toList()
     val MAX_ELEMENT = 9
-    val COMPARATOR = comparator { (x: Int, y: Int) ->  if (x > y) 1 else if (x < y) -1 else 0 }
+    val COMPARATOR = comparator { x: Int, y: Int ->  if (x > y) 1 else if (x < y) -1 else 0 }
 
     test fun maxWithComparator() {
         assertEquals(MAX_ELEMENT, Collections.max(TEST_LIST, COMPARATOR))