os_nova package installation on CentOS 7 is very slow

[Major Hayden]

The distro package installation for the os_nova role is *very* slow on CentOS and usually takes 5-8 minutes. Two packages are installed which are likely not needed:

  container-selinux - adds 30-45 seconds to the install, mainly for Docker
  openstack-selinux - adds 2-3 minutes to the install, mainly for how RDO deploys OpenStack services

These could be moved into an async task or possibly removed entirely.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/539688

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/539688
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-os_nova/commit/?id=0a3ce6116682e0ce745e4606b28ffee8c3407875
Submitter: Zuul
Branch: master

commit 0a3ce6116682e0ce745e4606b28ffee8c3407875
Author: Major Hayden <email address hidden>
Date: Mon Feb 5 12:57:09 2018 -0600

    Optimize SELinux bits in os_nova

    Installing openstack-selinux brings in a *ton* of policies and the
    vast majority do not apply to an OpenStack-Ansible deployment. We
    can bring in the individual policies that we need in each role.

    The openstack-selinux package takes 2-3 minutes to install and it
    brings in container-selinux (which is mainly for Docker) and that
    adds another 30-45 seconds.

    The patch also adds some required SELinux policies for virtlogd to
    work and for the non-KVM qemu gate jobs to function properly.

    Closes-Bug: 1746602
    Change-Id: Ib79cd5f8ebd9cb535c8051a29126262ede2b17d3

[Major Hayden (rackerhacker)]

This needs to go into Pike, too.

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/openstack-ansible-os_nova 17.0.0.0rc1 release candidate.