Move gate-solum-devstack-dsvm-centos7 to centos-7
Move gate-solum-devstack-dsvm-centos7 to centos-7

This is part of the migration from devstack-centos7 to centos-7 dibs.

Change-Id: Ib504a67f2086897d42384d9c1a4cc58f5af9ed8d
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

Tesora/tesora-project-config,dongwenjuan/project-config,openstack-infra/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,openstack-infra/project-config