Fuel Master 5.1 upgrade fails due to unexpected docker issues

[Matthew Mosesohn]

This is a placeholder bug to refer users to more troubleshooting of Fuel Master 5.1 upgrades.

There are two known issues to address:
1 - Docker IP address allocation made a mistake and gave the same IP to 2 different containers
2 - Docker unexpectedly crashed during the upgrade process

A user should run `service docker start` and then `dockerctl build` to turn on all containers and then repeat the upgrade process.

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/117818

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/117818
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=baaeee59026cdad605532dd4e6db04cb6bad306a
Submitter: Jenkins
Branch: master

commit baaeee59026cdad605532dd4e6db04cb6bad306a
Author: Evgeniy L <email address hidden>
Date: Fri Aug 29 19:29:18 2014 +0400

    Upgrades, added documentation for user in case of errors

    We have some known issues which we cannot
    address right now, in order to make user's
    live better, we decided to add documentation
    which will help user to workaround problems
    which he can have during the upgrade.

    Change-Id: I7381545f027d06d04b4144a466830af1e4a59b92
    Closes-bug: #1362685

[Evgeniy L (rustyrobot)]

Merged in 5.1 because it's more about documentation.