Make use of cloud init for vm preparation.

[weimens]

This merge request removes the need for the manual ubuntu installation and the manual network setup on the VMs.

./openstack-bootcamp/kolla3/prepare.sh
#logout or reboot to reload user groups

./openstack-bootcamp/kolla3/make-prepare.sh
./openstack-bootcamp/kolla3/make-net.sh
./openstack-bootcamp/kolla3/make-servers.sh 1
./openstack-bootcamp/kolla3/make-servers.sh 2
./openstack-bootcamp/kolla3/make-servers.sh 3
./openstack-bootcamp/kolla3/make-computes.sh 4
./openstack-bootcamp/kolla3/make-computes.sh 5
./openstack-bootcamp/kolla3/make-elastic.sh 9

should be sufficient to prepare a fresh ubuntu installtion for the kolla-ansible run.

In my case I had to replace all occurrences of ens3,ens4,ens5 with enp1s0, enp2s0, enp3s0 (in globals.yml and make-HELPER.sh), though that was not the case with the original host.