Fine-tune VGG16

In this workflow we are fine-tuning a VGG1G network, similar to "Fine-tune VGG16 (Python)". However, we won't make use of the DL Python Learner/Executor nodes, rather we use the DL Keras Network Learner and DL Network Executor to train and execute our networks in this workflow.

This is a companion discussion topic for the original entry at