Prepare Xena M2
Prepare Xena M2

Update the version metadata for Xena milestone M2

Change-Id: I83d682e6f6f684fcaef9e4e6dd8a562032c8c1f7

openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca,openstack/puppet-monasca