Upgrade from 7.0->8.0 failed

[Veronica Krayneva]

Steps to reproduce:
1. Deploy cluster on 7.0 (301 iso)
2. Download upgrade arch from here: HTTP_TORRENT=http://srv89-bud.infra.mirantis.net/fuelweb-iso/fuel-8.0-upgrade-28-2015-10-14_19-42-00.tar.lrz.torrent
3. Extract arch, execute ./upgrade.sh

Expected result:
Upgraded cluster to 8.0

Actual result:
2015-10-15 08:21:12 ERROR 20558 (cli) Cannot upgrade from Fuel 7.0. You can upgrade only from one of next versions: 6.1
Traceback (most recent call last):
  File "/var/tmp/upgrade/.fuel-upgrade-venv/lib/python2.6/site-packages/fuel_upgrade/cli.py", line 182, in main
    run_upgrade(parse_args(sys.argv[1:]))
  File "/var/tmp/upgrade/.fuel-upgrade-venv/lib/python2.6/site-packages/fuel_upgrade/cli.py", line 166, in run_upgrade
    checker_manager.check()
  File "/var/tmp/upgrade/.fuel-upgrade-venv/lib/python2.6/site-packages/fuel_upgrade/checker_manager.py", line 82, in check
    checker.check()
  File "/var/tmp/upgrade/.fuel-upgrade-venv/lib/python2.6/site-packages/fuel_upgrade/before_upgrade_checker.py", line 256, in check
    self.from_version, ', '.join(self.can_upgrade_from)))
WrongVersionError: Cannot upgrade from Fuel 7.0. You can upgrade only from one of next versions: 6.1
==================================================
Upgrade failed

[Alexander Kislitsky (akislitsky)]

Veronica, please provide diagnostic snapshot.

[Vladimir Khlyunev (vkhlyunev)]

Alexander, this bug was reproduced on CI - https://product-ci.infra.mirantis.net/job/8.0.system_test.ubuntu.upgrade_nova_cinder/6/artifact/UPGRADE/logs/fail_error_upgrade_master_nova_cinder-fuel-snapshot-2015-10-14_23-09-02.tar.xz you can use this snapshot

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/235223

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/235223
Committed: https://git.openstack.org/cgit/stackforge/fuel-web/commit/?id=aa2eebbc2a6e658f41b7d7a06a29ca1bb0ee0a17
Submitter: Jenkins
Branch: master

commit aa2eebbc2a6e658f41b7d7a06a29ca1bb0ee0a17
Author: Igor Kalnitsky <email address hidden>
Date: Thu Oct 15 13:05:10 2015 +0300

    Mаke possible to upgrade Fuel 7.0 to Fuel 8.0

    Since we're supporting only one consequent upgrade chain, and current
    master is 8.0, let's set 7.0 as previous release and unblock 7.0 -> 8.0
    upgrade chain.

    Change-Id: I0777ac908af45268760315329d26f4c5ce8c223a
    Closes-Bug: #1506380

[Veronica Krayneva (vkrayneva)]

Checked on 301 iso 7.0 and fuel-8.0-upgrade-33-2015-10-16_01-42-00.tar.lrz
Issue with "WrongVersionError: Cannot upgrade from Fuel 7.0. You can upgrade only from one of next versions: 6.1" was fixed

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/240216

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/240216
Committed: https://git.openstack.org/cgit/openstack/fuel-upgrade/commit/?id=60d05a99d6bbe1498a82895914a8bd620005788a
Submitter: Jenkins
Branch: master

commit 60d05a99d6bbe1498a82895914a8bd620005788a
Author: Igor Kalnitsky <email address hidden>
Date: Thu Oct 15 13:05:10 2015 +0300

    Mаke possible to upgrade Fuel 7.0 to Fuel 8.0

    Since we're supporting only one consequent upgrade chain, and current
    master is 8.0, let's set 7.0 as previous release and unblock 7.0 -> 8.0
    upgrade chain.

    Change-Id: I0777ac908af45268760315329d26f4c5ce8c223a
    Closes-Bug: #1506380