Digital Shadows App - Polling, Python 3 upgrade

[parag-metron]

Name of the app
Digital Shadows App

Describe the bug
There are a couple of issues in the Digital Shadows app:

1. There is an error when polling for incidents
2. The app exists in an older repository and uses Python 2. We would like to bring it into this repo and upgrade to Python 3.

To Reproduce
Steps to reproduce the behavior:

1. Create a new asset with the Digital Shadows app
2. In the app settings, enter your Digital Shadows credentials
3. Save the settings
4. Click "Poll Now". There is an error and no new incidents get polled

Expected behavior
The app should be able to poll for new incidents

Phantom Version (please complete the following information):

• OVA - Phantom VM 4.8.24304
• App Version - 1.1.0

[tpbosolo]

We have the same exact issue with 2.0.0, in addition current app creates two separate scheduled poles (visible in ingestion summary aunder admin settings).

[mjiyani-crest]

Closing this issue as this has been addressed as part of PR - #378.