fix(runtimeToPermanent): deepcopy settings before mangling

Otherwise, doing a list.remove() will modify the runtime policy object
that is backing the "zone object". This was seen in runtimeToPermanent()
for runtime interfaces added by NetworkManager.

Fixes: RHEL-5802
(cherry picked from commit 84d4ed7)

src/firewall/server/firewalld.py

@@ -463,7 +463,7 @@ def runtimeToPermanent(self, sender=None): # pylint: disable=W0613
         config_names = self.config.getZoneNames()
         for name in self.fw.zone.get_zones():
             conf = self.getZoneSettings2(name)
-            settings = FirewallClientZoneSettings(conf)
+            settings = FirewallClientZoneSettings(copy.deepcopy(conf))
             changed = False
             for interface in settings.getInterfaces():
                 if interface in self.fw._nm_assigned_interfaces: