Move testcase to own test function

Move testcase for getDefaultEmailAddress with mail_domain set in config.php to own test function.

tests/lib/util.php

@@ -46,7 +46,9 @@ class Test_Util extends PHPUnit_Framework_TestCase {
 	function testGetDefaultEmailAddress() {
 		$email = \OCP\Util::getDefaultEmailAddress("no-reply");
 		$this->assertEquals('no-reply@localhost.localdomain', $email);
-		
+	}
+
+	function testGetDefaultEmailAddressFromConfig() {
 		OC_Config::setValue('mail_domain', 'example.com');
 		$email = \OCP\Util::getDefaultEmailAddress("no-reply");
 		$this->assertEquals('no-reply@example.com', $email);