Unify test package names in kotlin-stdlib tests

This makes 'test.' an implicit package prefix, thus fixing the inspection
"Package directive doesn't match file location" positive in almost all
test files.

libraries/stdlib/test/comparisons/OrderingTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 

libraries/stdlib/test/coroutines/cancellation/CancellationExceptionTest.kt

@@ -1,9 +1,9 @@
 /*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-package coroutines.cancellation
+package test.coroutines.cancellation
 
 import kotlin.coroutines.cancellation.CancellationException
 import kotlin.test.Test

libraries/stdlib/test/exceptions/ExceptionTest.kt

@@ -1,5 +1,5 @@
 /*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
@@ -8,6 +8,7 @@ package test.exceptions
 import test.supportsSuppressedExceptions
 import kotlin.test.*
 
+@Suppress("Reformat") // author's formatting
 class ExceptionTest {
     private val cause = Exception("cause")
 

libraries/stdlib/test/numbers/NaNPropagationTest.kt

@@ -1,9 +1,9 @@
 /*
- * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-package numbers
+package test.numbers
 
 import kotlin.test.*
 

libraries/stdlib/test/ranges/URangeTest.kt

@@ -1,9 +1,9 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-package ranges
+package test.ranges
 
 import kotlin.test.*
 

libraries/stdlib/test/unsigned/UComparisonsTest.kt

@@ -1,9 +1,9 @@
 /*
- * Copyright 2010-2019 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-package unsigned
+package test.unsigned
 
 import kotlin.test.Test
 import kotlin.test.expect

libraries/stdlib/test/utils/TuplesTest.kt

@@ -1,9 +1,9 @@
 /*
- * Copyright 2010-2018 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-package test.tuples
+package test.utils
 
 import kotlin.test.*