Define release job for openstackclient
Define release job for openstackclient

openstackclient was never released and therefore was missing
release jobs.

Change-Id: Iabbdd5d8cc39dc91e48b1fa4ec0f2c94f70a6198
Needed-By: https://review.openstack.org/624934

openstack-infra/project-config,openstack-infra/project-config