[MRG] Updates LogisticRegressionCV to use get_scorer #9565
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Reference Issue
Fixes #9564
What does this implement/fix? Explain your changes.
Updates
linear_model.LogisticRegressionCVto use themetrics.get_scorerfunction instead of the currently usedmetrics.SCORERSdictionary to get scoring metric callables.Any other comments?
This PR also adds a test to check that a reasonable error message is being raised when an invalid value is passed to the
scoringparameter inLogisticRegressionCV