Fix to Tuner change trainer and optimizer configs >>Change batch_size in tuner (#449)

* special processing for batch_size in tuning

* Remove trainer_config from tuner tests

* Update tuner example without traning_config

* Remove trainer_config from tuner

* Fixed some problem with tuning

---------

Co-authored-by: Manu Joseph <manujosephv@gmail.com>

Author: ProgramadorArtificial