Connect to remote hosts as root

Since this is the user for which we setup the SSH key.

This commit allows to run kolla-ansible as vagrant user without using
sudo.

This only applies to multinode.

TrivialFix

Change-Id: Ie5231085a66511a520d4dbe5e9f35414acf1900b

dev/vagrant/bootstrap.sh

@@ -189,6 +189,7 @@ function configure_operator {
     cat > ~vagrant/.ansible.cfg <<EOF
 [defaults]
 forks=100
+remote_user = root
 
 [ssh_connection]
 scp_if_ssh=True