Create System Landscape Diagram (C4) to capture high level OCA architecture

[warrenrjwc]

Provide a C4 diagram (System Landscape) to replace our current high level draft diagrams of the OCA architecture. Our current architecture has the following issues:

• Need to add people and their persona
• Need to add the security devices and controls (ex firewalls, IPS, etc)
• Need to be consistent on representing products/security functions/capabilities