Documentation should be updated with actual information

[ElenaRossokhina]

It is necessary to update documentation with actual info:

#1 . https://docs.mirantis.com/openstack/fuel/fuel-master/operations.html#howto-shut-down-the-whole-cluster
Procedure of cluster starting looks strange: there are a lot of steps while we claim "Resources management includes detecting and recovering the nodes and resources under its control from a failure" (Section Corosync/Pacemaker, https://docs.mirantis.com/openstack/fuel/fuel-master/monitoring-guide.html#ha-cluster).

#2. https://docs.mirantis.com/openstack/fuel/fuel-master/reference-architecture.html#mirantis-openstack-6-1-network-performance-changes-and-results
Fuel 6.x performance metrics and comparison seem obsolete in 8.0 document

#3. https://docs.mirantis.com/openstack/fuel/fuel-master/terminology.html#terminology-main
Section "Juno" New release name is Liberty. Please, fix name and description.

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: master
Change author: Olga Gusarenko <email address hidden>
Review: https://review.fuel-infra.org/21287

[Olga Gusarenko (ogusarenko)]

#1. The issue will be addressed later (for Mitaka) during the OPs guide reorganization.
#2. The change for Mitaka (master) is on review https://review.fuel-infra.org/21287 .
#3. The issue will be addressed later during the new terminology reference creation.

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/21287
Submitter: Olga Gusarenko <email address hidden>
Branch: master

Commit: e7436cef8e779c4b975224e4e55820f31e3bd853
Author: Olga Gusarenko <email address hidden>
Date: Thu May 26 12:41:36 2016

[Ref Arch] Obsolete info

Removes the 6.0 and 6.1 related information from master (Mitaka release).

Change-Id: I3a26871f22fda84fad452b29977c647915987188
Partial-Bug: #1550388

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/349937

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/349937
Committed: https://git.openstack.org/cgit/openstack/fuel-docs/commit/?id=50131896b1fc11ace5eb34a51f58e32001eff617
Submitter: Jenkins
Branch: master

commit 50131896b1fc11ace5eb34a51f58e32001eff617
Author: OlgaGusarenko <email address hidden>
Date: Tue Aug 2 14:06:25 2016 +0300

    [UG] Adds shut down and start environment procedures

    Change-Id: Ica64a0ea83881fa28e672f3b7d6bd20297aa1738
    Closes-bug: #1550388