Add Taxii to Ansible

[infosec-alchemist]

Update the playbook to include variables for running taxii servers.

• [ ] Build a separate playbook to run the taxii server
• [ ] The taxii server technically should be a different host in the ansible "hosts'
• [ ] The taxii server could run completely separate from the other docker hosts. This likely means that we need to include the database roles

[infosec-alchemist]

Investigate if we can have a separate playbook, roles, hosts for Taxii server that just brings up Mongo, processor, taxii server, and nginx.

Put this on a separate Docker network, but have the mongodb on both networks? Can we use Docker to logically separate the deployments, even if they are running on the same host?