fixing the NodePathIterator for the Jackalope Doctrine DBAL and Jackrabbit test suite

for jackrabbit i am still seeing a failure with:
```
8) PHPCR\Tests\Reading\NodeReadMethodsTest::testGetNodesTypeFilter
Failed asserting that an array contains 'numberPropertyNode'.

/Users/lsmith/htdocs/cmf-sandbox/vendor/jackalope/jackalope-jackrabbit/vendor/phpcr/phpcr-api-tests/tests/05_Reading/NodeReadMethodsTest.php:199
```

and of course the ``Jackalope\NodeIteratorTest`` tests are failing

/cc @dantleech