Fix bad grep command

upgradeAll.sh

@@ -81,7 +81,7 @@ fi
 
 if [ ! -z "$(which docker)" ]
 then
-    if [ -z "$(grep '--iptables=false' /etc/default/docker)" ]
+    if [ -z "$(grep 'iptables=false' /etc/default/docker)" ]
     then
         echo 'DOCKER_OPTS="--iptables=false"' >> /etc/default/docker
         systemctl restart docker