Most of the time, the the StorPool drivers in the upstream OpenStack Git repositories (Cinder, Nova, os-brick) do not all contain the latest bugfixes and features that the StorPool team has developed. This may happen for several reasons: recent fixes and features have not yet been merged, others have not yet been backported to previous releases, some are considered too intrusive to backport, etc. The StorPool OpenStack Integration repository contains the latest versions of the StorPool Cinder backend driver, as well as several tools to help with configuring a deployed OpenStack cluster to use StorPool-backed volumes or assisting an OpenStack deployment system to configure a new cluster straight away.
For more information see the documentation on the StorPool website:
The StorPool OpenStack integration repository is developed by StorPool in a GitHub repository. This documentation is hosted at StorPool.