[THREESCALE-2194] Lazy configuration integration test.
[THREESCALE-2194] Lazy configuration integration test.

Load an invalid json to make sure that the invalid config does not break
the thread.

Signed-off-by: Eloy Coto <2a8acc28452926ceac4d9db555411743254cf5f9@gmail.com>

3scale/apicast,3scale/apicast,3scale/docker-gateway,3scale/apicast,3scale/docker-gateway,3scale/apicast