Update PaginatorComponent.php

controller:
```
$this->paginate['conditions'] = ['field_name' => 5];
$this->paginate();
```

results to:
```
WHERE (field_name = 5 AND field_name = 5)
```
the reason is pretty simple:
both $object->find and $query->applyOptions($options) add where(['field_name' => 5])

I am not quite sure if this change breaks anything but at least it solves this issue.