#28: Added lua and python scripts for endpoint operations

[umitbuyuksahin]

Fixes #28

[tkilias]

• We need to store the column definitions of the training table in the metadata table. Names and types in different column to have enough space for larger tables (VARCHAR limit of 2MB).

[tkilias]

Change the paramater model_name in autopilot training to job_name to align better with the terms used in sagemaker

https://github.com/exasol/sagemaker-extension/blob/42ddf84c74ee8b6edc8ea7aa064b4776b4d2739c/exasol_sagemaker_extension/lua/src/autopilot_training_main.lua#L142