Attempting to get passing builds on travisci

Currently the 5.2 builds fail due to the length checks on blowfish
hashes.  Try a shorter wall to see if those builds will pass.

lib/Cake/Utility/Security.php

@@ -272,7 +272,8 @@ protected static function _crypt($password, $type = null, $salt = false) {
 				$salt,
 			);
 			$salt = vsprintf($saltFormat[$hashType], $vspArgs);
-		} elseif ($salt === true || strpos($salt, '$2a$') !== 0 || strlen($salt) < 29) {
+		}
+		if ($salt === true || strpos($salt, '$2a$') !== 0 || strlen($salt) < 12) {
 			trigger_error(__d(
 				'cake_dev',
 				'Invalid salt: %s for %s Please visit http://www.php.net/crypt and read the appropriate section for building %s salts.',