installFirewall uses the firewall _settings from the role: firewall and firewall_zones and stores the applied settings in _settings per zone and also for the runtime and permanant firewalld environment.

uninstallFirewall uses the fw_changes _setting from the role and removed them from the zones in runtime and permanent firewalld environment, then clears fw_changes and savet it to _settings again.

updateFirewall calls uninstallFirewall and then installFirewall

_check_property now checks ports to be valid.