Explicitly declare property visibility, remove use of var

Codesniffer says that the `var` keyword must not be used to declare a
property and that visibility must be declared on class properties.

Change-Id: I28240aa0f394588b1df315621dbcd260c51430c1

tests/phpunit/includes/htmlform/HTMLAutoCompleteSelectFieldTest.php

@@ -6,7 +6,7 @@
  */
 class HtmlAutoCompleteSelectFieldTest extends MediaWikiTestCase {
 
-	var $options = array(
+	public $options = array(
 		'Bulgaria'     => 'BGR',
 		'Burkina Faso' => 'BFA',
 		'Burundi'      => 'BDI',

tests/phpunit/includes/registration/ExtensionProcessorTest.php

@@ -14,7 +14,7 @@ class ExtensionProcessorTest extends MediaWikiTestCase {
 	 *
 	 * @var array
 	 */
-	static $default = array(
+	public static $default = array(
 		'name' => 'FooBar',
 	);