Remove iptables from docker provisioning since there is no ipv6 support in the docker image
Remove iptables from docker provisioning since there is no ipv6 support in the docker image

baszoetekouw/OpenConext-deploy,baszoetekouw/OpenConext-deploy,OpenConext/OpenConext-deploy,OpenConext/OpenConext-deploy,baszoetekouw/OpenConext-deploy,OpenConext/OpenConext-deploy,baszoetekouw/OpenConext-deploy,OpenConext/OpenConext-deploy,OpenConext/OpenConext-deploy,baszoetekouw/OpenConext-deploy