Updated openstack/openstack
Project: openstack/neutron  5f5eb7aee71982c54829d3b1a9a456c7d6aba993

Ensure ip6tables are used only if ipv6 is enabled in kernel

On systems where ipv6 module is not loaded in kernel we need to avoid
usage of ip6tables. This patch reads
/proc/sys/net/ipv6/conf/default/disable_ipv6 file and if ipv6 is
disabled then ip6tables are not used in IptablesManager

Closes-Bug: #1352893

Change-Id: I07e5851aa25eb98b7a97dff86b9850475df85f64