dill replacement and keras fix

-cloudpickle is replaced with dill to allow pickling locked objects. -keras is replaced with tensorflow.keras, as for the latest version (2.5.0), the optimizers can not be accessed from keras (from keras.optimizers import SGD) is invalid. To be consistent, the code uses only tensorflow.keras

requested review from @fsauerbu

By Ahmed Markhoos on 2021-08-23T22:11:28 (imported from GitLab)

assigned to @fsauerbu

By Ahmed Markhoos on 2021-08-23T22:11:28 (imported from GitLab)

changed the description

By Ahmed Markhoos on 2021-08-23T22:31:34 (imported from GitLab)

added 1 commit

• c701e6bb - keras dependency removed

Compare with previous version

By Ahmed Markhoos on 2021-08-24T11:36:45 (imported from GitLab)

resolved all threads

merged

mentioned in commit 0bd99ca6

Thanks for the contribution