Added support for Service Principal authentication

[roberto-mardeni]

Purpose

Added support for Service Principal authentication via config.py settings

Does this introduce a breaking change?

[ ] Yes
[ x] No

Pull Request Type

What kind of change does this Pull Request introduce?

[ ] Bugfix
[x ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Documentation content changes
[ ] Other... Please describe:

How to Test

• Get the code

git clone [repo-address]
cd [repo-name]
git checkout [branch-name]
npm install

• Test the code

Follow the directions at https://docs.microsoft.com/en-us/azure/batch/quick-run-python on how to test with the Key based authentication
Switch the content of _AUTH_MODE to 'ServicePrincipal' in the src/config.py and provide the values of _AD_* settings (with a valid Service Principal credentials) and run the same script.

What to Check

Verify that the following are valid
Works as usual for the Key based authentication
Works with Service Principal authentication

[hatsem78]

Tiera erroro por todos lados no existe Traceback (most recent call last):
File "/home/havas/trabajos/batch-python-quickstart/src/python_quickstart_client.py", line 307, in
blob_client = azureblob.BlockBlobService(
AttributeError: module 'azure.storage.blob' has no attribute 'BlockBlobService' actulicen con la nueva versión quedo todo obsolteto