Fix duplicated magic config.

Aliasing connections is a more robust way to dynamically reconfigure
Table classes, and doesn't require as much work.

Also remove FixtureManager::_db it was a pointless reference.

Cake/TestSuite/Fixture/FixtureManager.php

@@ -41,13 +41,6 @@ class FixtureManager {
  */
 	protected $_initialized = false;
 
-/**
- * Default datasource to use
- *
- * @var DataSource
- */
-	protected $_db = null;
-
 /**
  * Holds the fixture classes that where instantiated
  *
@@ -69,11 +62,11 @@ class FixtureManager {
  * @return void
  */
 	public function fixturize($test) {
+		$this->_initDb();
 		if (empty($test->fixtures) || !empty($this->_processed[get_class($test)])) {
 			return;
 		}
-		$this->_initDb();
-		$test->db = $this->_db;
+		$test->db = ConnectionManager::get('test', false);
 		if (!is_array($test->fixtures)) {
 			$test->fixtures = array_map('trim', explode(',', $test->fixtures));
 		}
@@ -117,8 +110,6 @@ protected function _initDb() {
 			return;
 		}
 		$this->_aliasConnections();
-		$db = ConnectionManager::get('test', false);
-		$this->_db = $db;
 		$this->_initialized = true;
 	}
 
@@ -171,10 +162,12 @@ protected function _loadFixtures($fixtures) {
  */
 	protected function _setupTable(TestFixture $fixture, Connection $db = null, $drop = true) {
 		if (!$db) {
-			$db = $this->_db;
 			if (!empty($fixture->connection)) {
 				$db = ConnectionManager::get($fixture->connection, false);
 			}
+			if (!$db) {
+				$db = ConnectionManager::get('test', false);
+			}
 		}
 		if (!empty($fixture->created) && in_array($db->configName(), $fixture->created)) {
 			return;

Cake/TestSuite/Fixture/TestFixture.php

@@ -21,7 +21,6 @@
 use Cake\Database\Schema\Table;
 use Cake\Error;
 use Cake\Log\Log;
-use Cake\ORM\Table as Repository;
 use Cake\Utility\Hash;
 use Cake\Utility\Inflector;
 
@@ -274,8 +273,6 @@ public function drop(Connection $db) {
  * @return boolean on success or if there are no records to insert, or false on failure
  */
 	public function insert(Connection $db) {
-		Repository::config($this->table, ['connection' => $db]);
-
 		if (isset($this->records) && !empty($this->records)) {
 			list($fields, $values, $types) = $this->_getRecords();
 			$query = $db->newQuery()