* ENT-1396: Skeleton of HA testing project
* ENT-1396: Tidy-up arguments parsing and introduce ScenarioRunner.
* ENT-1396: More changes for ScenarioRunner.
* ENT-1396: Further changes.
* ENT-1396: Further changes.
* ENT-1396: Improve logging.
* ENT-1396: Add TODO comments to indicate what is going to be done in the future.