Lint errors in firewall role

[nigelbabu]

      22:81     error    line too long (84 > 80 characters)  (line-length)
      28:81     error    line too long (81 > 80 characters)  (line-length)
      34:81     error    line too long (90 > 80 characters)  (line-length)
      49:81     error    line too long (81 > 80 characters)  (line-length)
      53:81     error    line too long (81 > 80 characters)  (line-length)
      57:81     error    line too long (83 > 80 characters)  (line-length)

See https://ci.centos.org/view/Gluster/job/gluster_ansible-infra/3/console