Pymongo capture collection name

[avzis]

According to the specs -
mongodb should capture: "The collection being accessed within the database stated in db.name."
and save it in: db.mongodb.collection

Fixes #1539

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

Added validation to the tests to verify that the property db.mongodb.collection is captured correctly

Does This PR Require a Core Repo Change?

• Yes. - Link to PR:
• No.