ExperimentTrainingContext -- this could be removed.

[nicolay-r]

Pass labels count directly.
Reason: inheritance simplification

• refactor annotator_name

AREkit/arekit/common/experiment/api/ctx_training.py

Lines 4 to 14 in cd1fa12

	class ExperimentTrainingContext(ExperimentContext):
	""" Data, that is necessary for models training stage.
	"""
	def __init__(self, labels_count, name_provider):
	super(ExperimentTrainingContext, self).__init__(name_provider)
	self.__labels_count = labels_count
	@property
	def LabelsCount(self):
	return self.__labels_count