Update to show use of swagger-codegen-config.json
Update to show use of swagger-codegen-config.json

The swagger-codegen-config.json is what causes the Swagger Codegen to use isi_sdk as the package name for the Python bindings.

I also updated the sample code to use isi_sdk instead of swagger_client.
Isilon/isilon_sdk,Isilon/isilon_sdk