Clear containers has released a 3.0 version. This version is substantially more compliant with the OCI API. We would like to upgrade the default version to 3.0. Due to it's newness, we will also keep the 2.2 version so users can do a PREFERRED_VERSION override if they want the older behaviour.
assigning to Todor.
meta-intel-clear-containers v3.0 can be found here: http://git.yoctoproject.org/cgit/cgit.cgi/meta-intel-clear-containers/log/?h=v3.0