refactored Learner creation of bundle/console loggers
refactored Learner creation of bundle/console loggers

Bundle/console loggers are only created automatically in 
a before_create filter.

Separately an instance method: Learner#valid_loggers?
will report if the console and bundle logger objects 
are not nil.

An additional instance method:

  Learner#create_new_loggers

Will create and save the associated bundle and console objects.
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