Move files_versions to PSR-4 (#24571)

apps/files_versions/appinfo/info.xml

@@ -13,6 +13,7 @@ In addition to the expiry of versions, ownCloud’s versions app makes certain n
 	<types>
 		<filesystem/>
 	</types>
+	<namespace>Files_Versions</namespace>
 	<dependencies>
 		<owncloud min-version="9.1" max-version="9.1" />
 	</dependencies>

apps/files_versions/tests/ExpirationTest.php

@@ -24,7 +24,7 @@ namespace OCA\Files_Versions\Tests;
 
 use \OCA\Files_Versions\Expiration;
 
-class Expiration_Test extends \Test\TestCase {
+class ExpirationTest extends \Test\TestCase {
 	const SECONDS_PER_DAY = 86400; //60*60*24
 
 	public function expirationData(){

apps/files_versions/tests/VersioningTest.php

@@ -29,6 +29,8 @@
  *
  */
 
+namespace OCA\Files_Versions\Tests;
+
 require_once __DIR__ . '/../appinfo/app.php';
 
 use OC\Files\Storage\Temporary;
@@ -39,7 +41,7 @@ use OC\Files\Storage\Temporary;
  *
  * @group DB
  */
-class Test_Files_Versioning extends \Test\TestCase {
+class VersioningTest extends \Test\TestCase {
 
 	const TEST_VERSIONS_USER = 'test-versions-user';
 	const TEST_VERSIONS_USER2 = 'test-versions-user2';