Bump cinder-tempest-plugin 0.3.1 on stein
Bump cinder-tempest-plugin 0.3.1 on stein

New 0.3.1 version on stein.

Depends-On: https://review.rdoproject.org/r/24877
Change-Id: Ib4104f9fa30bc82c4ab6fcd2de09232770fcad02

redhat-openstack/rdoinfo