Mocking Wedge Address Configs

The SDK provides a method of mocking Wedge Address config values for code that relies on config values. The MockHandlerMixin class found in q2_sdk.tools.testing.mock_handler_mixin provides the function mock_wedge_address_configs to do this. In order to utilize this function, the mock class in the test file needs to also inherit this mixin class. It should look like the below snippet.

class MockTestingTestHandler(extension.TestingTestHandler, MockHandlerMixin):