* Split up lookup integration tests.
* Rename lookup_paths integration test.
This will avoid confusing it for a test of the `paths` lookup plugin, which does not exist.
* Fix lookup_pipe integration test.
The test now verifies it receives the correct output.
Adding a second task also causes code coverage to be properly registered for the lookup plugin.
* Rename ini lookup test to match plugin name.
* Update sanity ignore path.
* Update Shippable integration test groups.
* Update integration test group aliases.
* Rebalance AWS and Azure tests with extra group.
* Rebalance Windows tests with another group.
