In a project where contributors are free to use whatever editor they
want and we have linting tools that verify the proper formatting of
Python files, it should not be required to have a vim-specific line in
Python files.

Sets the appropriate config field if openshift_node_port_range is set
and also configures filewalls on each node.  firewalld already supports
port ranges like "30000-32000", while iptables needs that value
converted to the correct "30000:32000" form for use with `--dport`.

If not set, no node ports are opened.

It fail with that traceback:

    Traceback (most recent call last):
      File \"/tmp/ansible_ib5gpbsp/ansible_module_os_firewall_manage_iptables.py\", line 273, in <module>
        main()
      File \"/tmp/ansible_ib5gpbsp/ansible_module_os_firewall_manage_iptables.py\", line 257, in main
        iptables_manager.add_rule(port, protocol)
      File \"/tmp/ansible_ib5gpbsp/ansible_module_os_firewall_manage_iptables.py\", line 87, in add_rule
        self.verify_chain()
      File \"/tmp/ansible_ib5gpbsp/ansible_module_os_firewall_manage_iptables.py\", line 82, in verify_chain
        self.create_jump()
      File \"/tmp/ansible_ib5gpbsp/ansible_module_os_firewall_manage_iptables.py\", line 142, in create_jump
        input_rules = [s.split() for s in output.split('\\n')]