Fix bare require() to use App::uses()

Fixes #2346

lib/Cake/Console/Command/Task/ProjectTask.php

@@ -288,9 +288,7 @@ class ProjectTask extends AppShell {
 		$File = new File($path . 'Config' . DS . 'core.php');
 		$contents = $File->read();
 		if (preg_match('/([\s]*Configure::write\(\'Security.cipherSeed\',[\s\'A-z0-9]*\);)/', $contents, $match)) {
-			if (!class_exists('Security')) {
-				require CAKE . 'Utility' . DS . 'security.php';
-			}
+			App::uses('Security', 'Utility');
 			$string = substr(bin2hex(Security::generateAuthKey()), 0, 30);
 			$result = str_replace($match[0], "\t" . 'Configure::write(\'Security.cipherSeed\', \''.$string.'\');', $contents);
 			if ($File->write($result)) {

lib/Cake/Core/Object.php

@@ -152,9 +152,7 @@ class Object {
  * @return boolean Success of log write
  */
 	public function log($msg, $type = LOG_ERROR) {
-		if (!class_exists('CakeLog')) {
-			require CAKE . 'cake_log.php';
-		}
+		App::uses('CakeLog', 'Log');
 		if (!is_string($msg)) {
 			$msg = print_r($msg, true);
 		}

lib/Cake/Test/test_app/View/Posts/test_nocache_tags.ctp

@@ -75,9 +75,7 @@
 </p>
 <?php
 if (!empty($filePresent)):
-	if (!class_exists('ConnectionManager')) {
-		require CAKE . 'model' . DS . 'connection_manager.php';
-	}
+	App::uses('ConnectionManager', 'Model');
  	$connected = ConnectionManager::getDataSource('default');
 ?>
 <p>