Describe the bug
This is basically one of the issues I called out in #1855:
When I run datasource new and exit the process at any point (e.g. ctrl+c), I still get a block for the credentials in config_variables.yml. However great_expectations.yml doesn't have the datasource entry. I would expect any kind of failure in the datasource creation process to not leave any artifacts.

**To Re

Hello,

First of all, thanks for the great package.
I'm trying to compute density maps of a 3 dimensional points distribution. I understood from the documentation that a variable bandwith method was available but I couldn't figure out how to set up this option.
Additionnaly, in the case of a fixed bandwidth KDE for multidimensional data, I would have expected as in the stats_models_multivari

Today i add a license for this repository.