Open up gearman server port.

We'll need to be able to access this remotely.

Change-Id: I6a4654fde2577203fe9c4e3d9ececa17c3a54590

elements/gearman/element-deps

@@ -0,0 +1 @@
+os-refresh-config

elements/gearman/os-refresh-config/pre-configure.d/97-gearman-iptables

@@ -0,0 +1,30 @@
+#!/bin/bash
+set -eu
+
+OK=/opt/stack/gearman-iptables.ok
+
+if [ -e $OK ] ; then
+    exit 0
+fi
+
+DISTRO=`lsb_release -si` || true
+
+if [[ "Fedora" = $DISTRO ]]; then
+
+    # Check if the iptables service is active
+    if systemctl is-active iptables.service ; then
+        IPT_FILE=/etc/sysconfig/iptables
+        if [ -f $IPT_FILE ]; then
+            iptables-restore < $IPT_FILE
+        fi
+
+        # Gearman server
+        iptables -I INPUT -p tcp --dport 4730 -j ACCEPT
+
+        iptables-save > $IPT_FILE
+
+    fi
+
+fi
+
+touch $OK