Comment 4 for bug 1799638

Reviewed: https://review.openstack.org/630936
Committed: https://git.openstack.org/cgit/openstack/tripleo-heat-templates/commit/?id=9b284e74cbdcf43253edaf424534b71a483fdb69
Submitter: Zuul
Branch: master

commit 9b284e74cbdcf43253edaf424534b71a483fdb69
Author: Rabi Mishra <email address hidden>
Date: Tue Jan 15 16:13:33 2019 +0530

    Create /run/netns if does not exist

    Unlike docker with podman you can't mount a host directory
    that does not exist. We did some work as part of bug 1799638
    take care of this for reboots. However, we need it to be created
    for fresh installations, as nodes are not necessarily rebooted
    after installing paunch. The real issue without reboots did not
    surface before the next patch in this series, as we were using
    cni0 bridge network for some containers and that resulted in
    namespace being created and the directory existing for
    neutron_dhcp and neutron_l3 containers in step 4 to mount them.

    This patch creates/removes a temp namespace in host_prep_tasks
    to ensure that the directory exists.

    Change-Id: I19d660168c98887a5e352b3413235888c800760d
    Related-Bug: #1799638