added cloudwatch metrics and advanced threat log support

[mkalappattil]

Description

added cloudwatch metrics and advanced threat log support

How Has This Been Tested?

automated integration tests

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist

• [x ] I have updated the documentation accordingly.
• [x ] I have read the CONTRIBUTING document.
• [x] I have added tests to cover my changes if appropriate.
• [x] All new and existing tests passed.

[panw-ppalkar]

LGTM