Move packages section earlier
Move packages section earlier

For SLES, RabbitMQ is part of the OpenStack repo, we thus need to
setup the Havana repository first before we can install RabbitMQ.

Closes-Bug: #1241190
Backport: stable/havana

Change-Id: I060606326134449cf582549fa68fa26f61171b75

openstack/openstack-manuals,saeki-masaki/openstack-manuals,kairoaraujo/openstack-manuals,Akasurde/openstack-manuals,kairoaraujo/openstack-manuals,gongysh2004/openstack-manual,AlekhyaMallina-Vedams/openstack-manuals,Akasurde/openstack-manuals,saeki-masaki/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,potsmaster/openstack-manuals,openstack/openstack-manuals,gongysh2004/openstack-manual,openstack/openstack-manuals,openstack/openstack-manuals,potsmaster/openstack-manuals