ORM:Schema-tool:create failure -- the result depends on xml files enumeration order of RecursiveDirectoryIterator in context of SINGLE_TABLE inherantence

= Relevant configuration: =
resources.doctrine.driver.class = Doctrine\ORM\Mapping\Driver\XmlDriver
resources.doctrine.driver.dir = APPLICATION_PATH "/../library/Droop/Model/Xml"
resources.doctrine.cache.class = Doctrine\Common\Cache\ArrayCache
resources.doctrine.conn.driver = pdo_mysql

= Models hierarchy =
class Sysbase {}
class Drooplet extends Sysbase {}
class Menu extends Sysbase {}

= Xml driver =
attached

= Error =
While using command line to generate schema [php doctrine.php orm:schema-tool:create --dump-sql], it reports error "The table with name 'system' already exists." on windows however not on linux.

It is because the ClassMetaFactory.php depends on the sequence of result returned by getAllClassNames(). In this scenario, it's in descending order on linux and ascending on windows.
124 foreach ($this->driver->getAllClassNames() as $className)

127
128 return $metadata;
This order populates to SchemaTool::getSchemaFromMetadata(); If the base model is processed before it's descendants, everything is OK. Otherwise, it will complain about the table already exists.

= Fix =
ClassMetaFactory.php
128 return $this->loadedMetadata;