ECS Normalization to Replace ElastiFlow/Synesis Logstash Pipelines

[JaminB]

ElastiFlow and Synesis are amazing tools, but maintaining compatibility with them has introduced significant technical debt into DynamiteNSM.

We will be migrating away from these LogStash pipelines and instead handle normalization on the agent component itself, allowing for more flexible downstream integration.

NetFlow, IPFix, Zeek, and Suricata will be supported via ECS going forward.

As of 0.8.0 the agent component supports

https://www.elastic.co/guide/en/ecs/current/ecs-using-ecs.html

• Migration to OpenDistro #72 - Migrate to Open Distro
• Standarize Default Index Names (Templates/Patterns)
• Remove ElastiFlow Dashboards
• Remove Synesis Dashboards