The 'free' strategy still attempts to do all hosts per task before going to the next, it just doesn't wait for slow hosts,
This strategy processes each host as fast as possible to the end of the play before trying to process another host in the pool.
* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.
