Revise upgrade instructions for 5.1

[Meg McRoberts]

Revise http://docs.mirantis.com/openstack/fuel/master/user-guide.html#upgrade-from-an-earlier-version
for 5.1.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/116422

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/116422
Committed: https://git.openstack.org/cgit/stackforge/fuel-docs/commit/?id=52d78a1fe70f94acb016e653404fdb21f5354b0b
Submitter: Jenkins
Branch: master

commit 52d78a1fe70f94acb016e653404fdb21f5354b0b
Author: Meg McRoberts <email address hidden>
Date: Fri Aug 22 18:13:53 2014 -0700

    Upgrade/update instructions for 5.1; relnotes descriptions

    This commit covers all the docs about upgrade and update
    as well as refinements to the what-is, new-features, and
    other-enhancements sections.

    Includes change to use lrzuntar to unpack the 5.1 tarball
    with a warning that the Fuel Master node requires 2GB RAM for
    this to work, with a link to the hardware requirements for
    the master

    Includes corrections to the Release Notes Upgrade and Update sections
    and to this information in the User Guide.

    user-guide/cli.rst -- info from https://review.openstack.org/120428
    about the update option.

    Ref-Arch now includes 8000-fuel-upgrade that describes how
    upgrade works

    Release Notes are restructured to include:
    - "Known Issues fixed in 5.1 and 5.0.2" is added in 117672
    - "HA issues fixed in 5.1" is added in 117338

    Change-Id: Ie2054b31ce216942fd64b5bf274d8efa7d300bc4
    Closes-Bug: 1360372
    Closes-Bug: 1367199

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/5.1
Review: https://review.openstack.org/123370

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/123370
Committed: https://git.openstack.org/cgit/stackforge/fuel-docs/commit/?id=0460c4b691037f125bcebeb01c55b9d8e1ddf441
Submitter: Jenkins
Branch: stable/5.1

commit 0460c4b691037f125bcebeb01c55b9d8e1ddf441
Author: Meg McRoberts <email address hidden>
Date: Fri Aug 22 18:13:53 2014 -0700

    Upgrade/update instructions for 5.1; relnotes descriptions

    This commit covers all the docs about upgrade and update
    as well as refinements to the what-is, new-features, and
    other-enhancements sections.

    Includes change to use lrzuntar to unpack the 5.1 tarball
    with a warning that the Fuel Master node requires 2GB RAM for
    this to work, with a link to the hardware requirements for
    the master

    Includes corrections to the Release Notes Upgrade and Update sections
    and to this information in the User Guide.

    user-guide/cli.rst -- info from https://review.openstack.org/120428
    about the update option.

    Ref-Arch now includes 8000-fuel-upgrade that describes how
    upgrade works

    Release Notes are restructured to include:
    - "Known Issues fixed in 5.1 and 5.0.2" is added in 117672
    - "HA issues fixed in 5.1" is added in 117338

    Change-Id: Ie2054b31ce216942fd64b5bf274d8efa7d300bc4
    Closes-Bug: 1360372
    Closes-Bug: 1367199