refactor find many with many translations

Based on https://github.com/jackalope/jackalope/issues/239#issuecomment-52408182 we should add a pseudo loop in here?
like 
```
$nodes = $session->getNodes($absolutePaths);
foreach ($nodes as $node) {
}

return $nodes;
```

cause that nodes are uses by the translation creation later, but not out of that array - out of the cached nodes instead. That was my idea.