For interactive slurm jobs to run, such as "srun -N 1 -n 1 –pty bash -i "

For interactive slurm jobs to run, such as "srun -N 1 -n 1 –pty bash -i ", we need to add a rule to accept packets from the Private Network. In MonARCH, {{ PRIVATE_NETWORK_CIDR }} is defined in vars/vars.yml but it defaults to the M3 value of "172.16.200.0/21" when not defined. (tasks/main.yml)