stdlib tests: move JVM-only test source files

libraries/stdlib/jvm/test/collections/IteratorsJVMTest.kt

@@ -0,0 +1,20 @@
+@file:kotlin.jvm.JvmVersion
+package test.collections
+
+import kotlin.test.*
+import java.util.*
+
+class IteratorsJVMTest {
+
+    @Test fun testEnumeration() {
+        val v = Vector<Int>()
+        for (i in 1..5)
+            v.add(i)
+
+        var sum = 0
+        for (k in v.elements())
+            sum += k
+
+        assertEquals(15, sum)
+    }
+}