MLOps with Azure ML

Manage environments in conda YAML files (#158)

* .

* .

* Update code_test.py

* .

* Update Dockerfile

* Do not use conda-merge

* Move all 3 conda files to a single dir
* Do not use conda-merge
* Pin package versions

* PR review fixes

* Update Dockerfile

* PR review fixes

* Update training_dependencies.yml

* Update code_test.py