This patch fixes the wrong reference of NotFoundException which
is recently changed in mistral by replacing it with the new
exception 'DBEntityNotFoundError'. This patch also fixes the issue
of TypeError which gets raised if we don't pass context argument to
_create_client method of mistral_actions/openstack.py.
This patch fixes the wrong reference of NotFoundException which is recently changed in mistral by replacing it with the new exception 'DBEntityNotFoundError'. This patch also fixes the issue of TypeError which gets raised if we don't pass context argument to _create_client method of mistral_actions/openstack.py.