Update how Forseti sends resource/violation data to Security Center

[gkowalski-google]

Story

CSCC now supports struct/dictionary objects in the source properties field. Forseti is currently dumping the JSON dictionary to a string and sending that to Security Center. CSCC is moving away from supporting large string values and Forseti needs to use the dictionaries instead.

Proposed Solution

Update the CSCC Notifier to not dump the JSON dictionary to a string in the following places:

• resource data
• violation data

Acceptance Criteria

• Confirm CSCC integration still works and confirm on the backend side that the finding source properties is in a supported state.