Throttle avoidance
Throttle avoidance

Make sure all call to the OpenStack API are executed at the configured
intervals, so as to avoid throttling.

arbrandes/hastexo-xblock,hastexo/hastexo-xblock,arbrandes/hastexo-xblock,hastexo/hastexo-xblock,hastexo/hastexo-xblock,arbrandes/hastexo-xblock,arbrandes/hastexo-xblock,arbrandes/hastexo-xblock,hastexo/hastexo-xblock