* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.
* Include change classification data in metadata.
* Add support for disabled tests.
* Add support for unstable tests.
* Add support for unsupported tests.
* Overhaul integration aliases sanity test.
* Update Shippable scripts to handle unstable tests.
* Mark unstable Azure tests.
* Mark unstable Windows tests.
* Mark disabled tests.
