This test is designed to verify that a single node ONOS cluster behaves
correctly when all ONOS nodes die. We will kill the ONOS node and verify
correct behavior as the node restarts.

The gerneral structure for the test:
- Startup
- Assign switches
- Verify ONOS state and functionality
    - Device mastership
    - Intents
    - Leadership election
    - Distributed Primitives
- Kill ONOS node
- Restart ONOS node
- Verify ONOS state and functionality
- Dataplane failures
    - link down and up
    - switch down and up