Updated openstack/openstack
Project: openstack/glance_store  7d24312c4f093d2fd10e26c1d615625760fea3ce

Use testr directly from tox

Change-Id: I0da3538ff11639982ebc082a1834968e3d6a71d3
Signed-off-by: Zhi Yan Liu <zhiyanl@cn.ibm.com>