Redesign Immune

[danvixent]

This PR will add the following to immune:

• immune fire : This command will fire events repeatedly to the designated convoy server, upon completion it will output a log file giving a summary of the metrics such as:
  • Error & Success rate
  • Max, Min & Avg Request time
  • A log of all the ids of the events sent and the time they were sent.
• immune recv : This command will act as a receiver for the event deliveries from convoy, upon completion it will output a log of the events it received and the time they were received. How will this component know when to exit? a --timeout flag will be provided.
• immune compute : The command will take the logs output by the two commands above and produce a differential log; it will output metrics such as:
  • Highest time to receive event delivery (end-to-end measurement, using the provided logs)
  • Avg Time to receive event delivery.