Fix wrong configuration for `service_plugins`

Change `service_plugins =
neutron.plugins.services.agent_loadbalancer.plugin.LoadBalancerPlugin`
to
`service_plugins =
neutron.services.loadbalancer.plugin.LoadBalancerPlugin`

Fixes bug #1257210

Change-Id: Ida84acc3ba3d167a3a39c38f55b0c9de781f1b56
Install Guide: Add link to proper chapter

Link to networking chapter of the Config Guide, not to the table
of contents.

Change-Id: I65db7709809a5269da248fdebb298df9fd3d838a
backport: havana
Closes-Bug: #1253514
Fix name of Cloud Admin Guide

It's Cloud Administrator Guide as Anne pointed out in
https://review.openstack.org/#/c/60914/

backport: havana
Change-Id: I78ed9cfecb9e48263ab62e0902905b4d770a7fe4
Message bus additions for RHEL/CentOS/Fedora distributions

Added the default 'qpid' implementation details for neutron.conf as this was omitted and reported upstream.

Change-Id: I527751f8380dd1883fb9f1159089f7050130fc74
Closes-bug: #1258292
Install Guide: Use OS_* for variables

The variables are now OS_SERVICE..., change them.

Change-Id: I945506fe943d58116456c4dbffb343a29403bf4c
backport: havana
Added Complete Doc conventions in user-guide.

Change-Id: Ibbc5cd3be6343a05a0537508f6e580a597447af4
Partial-Bug: #1121866
Remove outdated libvirt_vif_driver settings

There is no longer a need to modify the libvirt_vif_driver conf
setting, it should always be the default value of:

libvirt_vif_driver=nova.virt.libvirt.vif.LibvirtGenericVIFDriver

This patch removes any reference to deprecated options for the
libvirt_vif_driver parameter.

Closes-bug #1192833

As a side-effect, this patch removes a section that contains this note:

      <note>
        <para>When using libvirt &lt; 0.9.11, one must also edit
            <filename>/etc/libvirt/qemu.conf</filename>, uncomment the
          entry for 'cgroup_device_acl', add the value '/dev/net/tun'
          to the list of items for the configuration entry, and then
          restart libvirtd.</para>
      </note>

It's not clear to me whether this is required or not with the
generic VIF driver plugin.

Change-Id: I233b18c8021bae6218faee63828c093d9b5b883d
backport: havana
Merge "Fix name of Cloud Admin Guide"
Merge "Added Complete Doc conventions in user-guide."
Merge "Message bus additions for RHEL/CentOS/Fedora distributions"
Merge "Install Guide: Add link to proper chapter"
Merge "Fix wrong configuration for `service_plugins`"
Explicitly set keystone auth_strategy

Explicitly set keystone as the auth_strategy. Also moved sysctl
load command closer to where the related config changes
actually appear.

Closes-Bug: #1258295
backport: havana
Change-Id: I8ae977c8eac984c2f56b9318b6369e02847546d1
Merge "Install Guide: Use OS_* for variables"
Merge "Explicitly set keystone auth_strategy"
Merge "Remove outdated libvirt_vif_driver settings"