Minor: normalize '@Test' annotation casing in all tests.

libraries/stdlib/test/reflection/AnnotationsTest.kt

@@ -2,7 +2,7 @@
 package test.reflection
 
 import kotlin.test.*
-import org.junit.Test as test
+import org.junit.Test
 
 @Retention(AnnotationRetention.RUNTIME)
 annotation class MyAnno
@@ -13,7 +13,7 @@ class AnnotatedClass
 
 
 class AnnotationTest {
-    @test fun annotationType() {
+    @Test fun annotationType() {
         val kAnnotations = AnnotatedClass::class.java.annotations.map { it!!.annotationClass }
         val jAnnotations = AnnotatedClass::class.java.annotations.map { it!!.annotationClass.java }