Updated openstack/openstack
Project: openstack/neutron  180fe98a9f9995a8dc5c14f8fb8d0ceb51ee3f4c

Make sudo check in ip_lib.IpNetnsCommand.execute optional

If the process runs as root the root_helper and sudo check
are not required.

Closes-Bug: #1393184
Change-Id: I7876ca7e4652f8152d1a8a0015cc897b09b31899