Finding types in default namespaces

[dyron]

While using https://github.com/goetas-webservices/xsd2php the OTA unit tests failed with messages like

[...]
25) GoetasWebservices\Xsd\XsdToPhp\Tests\JmsSerializer\OTA\OTASerializationTest::testConversion
GoetasWebservices\XML\XSDReader\Exception\TypeException: Can't find type named {}#NightDurationType, at line 191 in /var/www/html/xsd2php/tests/JmsSerializer/OTA/otaxml/OTA_SimpleTypes.xsd  in /var/www/html/xsd2php/vendor/goetas-webservices/xsd-reader/src/SchemaReader.php:1136

26) GoetasWebservices\Xsd\XsdToPhp\Tests\JmsSerializer\OTA\PHPConversionTest::testMultiplicity
GoetasWebservices\XML\XSDReader\Exception\TypeException: Can't find type named {}#ary, at line 6 in schema.xsd

27) GoetasWebservices\Xsd\XsdToPhp\Tests\JmsSerializer\OTA\PHPConversionTest::testNestedMultiplicity
GoetasWebservices\XML\XSDReader\Exception\TypeException: Can't find type named {}#ary, at line 5 in schema.xsd

28) GoetasWebservices\Xsd\XsdToPhp\Tests\JmsSerializer\OTA\PHPConversionTest::testMultipleArrayTypes
GoetasWebservices\XML\XSDReader\Exception\TypeException: Can't find type named {}#ArrayOfStrings, at line 13 in schema.xsd

[Guite]

@dyron thank you very much for the fix

@goetas adding you as reviewer

[goetas]

@dyron Could you please add a test for this usecse?

[dyron]

A test is added inspired by goetas-webservices/xsd2php#22