Add method to test definition
Move schema tests to their own module
Move session factory to utils module
Add schema test
Begin test functionality helper
Add host and scheme at top level config
Make config mandatory
Create config in YamlTestLoader
Fix up WebTest construction
Rename method for consistency
Create extension point for assertions
Load assertions plugins on instantiation
Add initial status code assertion
Hook up WebTest
Add test running assertion
Test connection error
Fix test
Fix schema for assertions
Hook up running test
Add test for test failure case