Issues with lrscheduler

[AnasAlsharo]

Hi. During training of the model this error started to appear after the latest update.

line 797, in _raise
raise ex.with_traceback(sys.exc_info()[2]) # set env var OC_CAUSE=1 for full trace
omegaconf.errors.ConfigAttributeError: Key 'lr_scheduler' is not in struct
full_key: train.lr_scheduler
object_type=dict

I believe that configs files needs to be updated as well.

Anas.

[sarlinpe]

A typo slipped through a recent PR, will be fixed by #32.