Extra information saved, Duplicate code

[ArlindKadra]

Description

OpenMLClassificationTask, OpenMLLearningCurveTask in task.py need a refactor. They save information which is already there by inheritance.
Edit.
It seems like the OpenMLLearningCurveTask should extend OpenMLClassificationTask and not OpenMLSupervisedTask.

openml-python/openml/tasks/task.py

Lines 144 to 151 in 7b81dae

	target_name=target_name,
	data_splits_url=data_splits_url,
	)
	self.target_name = target_name
	self.class_labels = class_labels
	self.cost_matrix = cost_matrix
	self.estimation_procedure["data_splits_url"] = data_splits_url
	self.split = None

openml-python/openml/tasks/task.py

Lines 203 to 210 in 7b81dae

	target_name=target_name,
	data_splits_url=data_splits_url,
	)
	self.target_name = target_name
	self.class_labels = class_labels
	self.cost_matrix = cost_matrix
	self.estimation_procedure["data_splits_url"] = data_splits_url
	self.split = None

[ArlindKadra]

Fixed in #588