Make connection aliasing more thorough.

Use either test prefixed or unprefixed connections to create the alias
map. This allows only the test connections to be defined in
configuration for CI servers, and still correctly alias the standard
connection names.

Cake/TestSuite/Fixture/FixtureManager.php

@@ -88,14 +88,20 @@ public function fixturize($test) {
 	protected function _aliasConnections() {
 		$connections = ConnectionManager::configured();
 		ConnectionManager::alias('test', 'default');
+		$map = [
+			'test' => 'default',
+		];
 		foreach ($connections as $connection) {
-			if ($connection === 'default') {
+			if (isset($map[$connection])) {
 				continue;
 			}
-			if (strpos($connection, 'test') === 0) {
-				continue;
+			if (strpos($connection, 'test_') === 0) {
+				$map[$connection] = substr($connection, 5);
+			} else {
+				$map['test_' . $connection] = $connection;
 			}
-			$alias = 'test_' . $connection;
+		}
+		foreach ($map as $alias => $connection) {
 			ConnectionManager::alias($alias, $connection);
 		}
 	}