Error building the neural network docker image

[boladjivinny]

I kept getting this error while building some of the neural network docker images (only tried for GNN-s2v and GGSSN-GMN). Apparently, it is related to this grpc/grpc#34569 which I was able to fix by changing the explicitly specifying the version of grpcio that I wanted to be used in the requirements. There probably is a better fix for this, but I am just putting it out there in case someone might need it too.

Here is what my requirements.txt file looks like for GGSSN-GMN

grpcio==1.50.0 #<- added this ->
coloredlogs==15.0.1
dm-sonnet==1.34
MarkupSafe==2.0.0
networkx==2.5
pandas==1.3.5
scikit-learn==1.0.2
tensorflow-estimator==1.14.0
tensorflow-probability==0.7
tensorflow==1.14.0
tqdm==4.64.0