MLManager remove tracking_uri param requirement

Fixed the tracking_uri parameter by forcing http so users don't need to manually add it.

Fixed Bug with Instantiation of MLManager Class

1. Replaced function call in instantiation of MLManager with a globally defined get_pod_url call
2. Moved static method get_pod_url to global scope

MLManager Finds URL of MLFlow Pod

Merge pull request #5 from splicemachine/DBAAS-1954

Merge DBAAS-1954 to master-- added tracking w/ mlflow pod

13.1

removed excess files

Refactored and new features

Lots of new stuff!

Changed name of SpliceCloudContext

12.2

Update context.py

Added multiclass evaluator

added multiclass evaluator
you can now use that to get f1, precision, recall and accuracy from your predictions dataframe!!!
YAY!

Complete Refactor and new features

Breaking Changes:
-- show_confusion_matrix takes in spark instead of sc and sqlcontext
-- ModelEvaluator has been renamed to SpliceBinaryClassificationEvaluator
-- Added SpliceRegressionEvaluator
-- Added SpliceCloudContext with jdbc url autofinding and h2o support
-- added feature importance to decision tree visualizer class

Changed SqlContext to SparkSession

11.1

Update context.py

Alpha

Compatible with service