These tools help simulate rolling downtime by taking down service
containers in a controlled fashion. While this can be done manually,
using a script to inspect the inventory for targets is much easier.
Having the rolling downtime happen automatically is also a bit less
error prone.
Tests for things like response times will be placed in the tests
directory, allowing for scripts to be written against different services
to try different things (like adding resources while rolling downtime
happens).
There is no central orchestration for the two components currently, in
order to keep things simple. Restarting containers and running the tests
is therefore best accomplished in a pair of tmux sessions.
Change-Id: I2d8e3484bbb1a71d2cd0c4124f824d49f76e5c2c