[maven-release-plugin] copy for tag openstack-cloud-2.8

[maven-release-plugin] copy for tag openstack-cloud-2.7

[maven-release-plugin] copy for tag openstack-cloud-2.6

[maven-release-plugin] copy for tag openstack-cloud-2.5

[maven-release-plugin] copy for tag openstack-cloud-2.4

[maven-release-plugin] copy for tag openstack-cloud-2.3

[maven-release-plugin] copy for tag openstack-cloud-2.2

[maven-release-plugin] copy for tag openstack-cloud-2.1

[maven-release-plugin] copy for tag openstack-cloud-2.0

[maven-release-plugin] copy for tag openstack-cloud-2.0-beta