LSTMStateTransitionModel: Make additional parameters configurable

[teubert]

Requirement Text
There are many features in layers as well as fitting and compiling model- Make more configurable

Suggested Solution
part of configurable params. See https://keras.io/api/models/model_training_apis/ for options.

Want to support:

• all compile options
• From fit
  • 'verbose'
  • 'callbacks':
  • 'shuffle'
  • 'use_multiprocessing'

DoD

• Implement feature
• Add to example
• Add to doccomments
• Add tests