Fix nsenter commands on centos
Fix nsenter commands on centos

The follow-context switch is not valid on early releases of systemd. This
change removes the optional switch so that nsenter can work on all of
our platforms.

Change-Id: I13d05ba8bcfe785257a9cf98dbdb6024ec937816
Signed-off-by: Kevin Carter <ffb54fded2f22052678e45d78b58d223654eb6fa@rackspace.com>

openstack/openstack-ansible-plugins,openstack/openstack-ansible-plugins