fixed a bug in cross validation cofiguration in pipeline selector

cdplib/pipeline_selector/PipelineSelector.py

@@ -236,7 +236,7 @@ class PipelineSelector(ABC):
             kwargs = kwargs or {}
 
             self._cross_validation = functools.partial(
-                    self._cross_validation, **kwargs)
+                    cross_validation, **kwargs)
 
             self.configured_cross_validation = True