lstm model testing

[madhuriangel]

Please review the code for lstm model
This code is a simple code running on batch_size=32 and epoch 20
It's taking around 10-12 hours to execute. But we need to do more testing.

I will provide another code that is supposed to check to adjust the value of the hyperparameter.

[lyashevska]

thanks @madhuriangel
I am reviewing it now, could you please specify which file do you want me to focus on (I started with lstm_function_halfdata_test.py) and what does and does not work.