Also fix unwrapping an optional in the test app
* Enable app_specs and monkey test if GDT_DEV is 1 Also address GDT renaming in the test app. * Fix indentation
* Create a GDT test app for generating events * Add monkey tests and support for tvOS and macOS in the test app app_spec * Comment out tests for now Needs >= cocoapods-1.8.0 * Remove unsupported property