The systemd version of iptables requires the 'iptables-services' package
for having the `regular` iptables rule restore on service startup.
The service also needs to be enabled explicitly.
Another iptables related issue with multinode_setup.sh,
tries to executes the iptables command without login shell.
The non-login shell does not contains /usr/sbin in PATH,
so multinode_setup.sh changed to use login shell defaults.
Warning: This change enables the iptables service on all
distribution.
Change-Id: I3174e43b3b19e28073a4364dd0f66fc39b0fa815
b7ab706f90