remove or replace iptables-services from RHEL-7

[flybyray]

https://github.com/robertdebock/ansible-role-firewall/blob/master/vars/main.yml#L26

error:

fatal: [rhel7]: FAILED! => {"changed": false, "msg": "No package matching 'iptables-services' found available, installed or updated", "rc": 126, "results": ["firewalld-0.6.3-11.el7.noarch providing firewalld is already installed", "iptables-1.4.21-35.el7.x86_64 providing iptables is already installed", "No package matching 'iptables-services' found available, installed or updated"]}