Tests failed due wrong reliase set

[Igor Yozhikov]

Failed tests:
https://packaging-ci.infra.mirantis.net/job/9.0-pkg-systest-ubuntu/152/
https://packaging-ci.infra.mirantis.net/job/9.0-pkg-systest-ubuntu/154/
https://packaging-ci.infra.mirantis.net/job/9.0-pkg-systest-ubuntu/158/

[Aleksandra Fedorova (bookwar)]

Invalid parameter OPENSTACK_RELEASE=mitaka comes from zuul trigger

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

Reviewed: https://review.fuel-infra.org/18379
Submitter: Alexander Evseev <email address hidden>
Branch: master

Commit: a53dd75359d81dfe23a5ac24deab0ba31f6385b7
Author: Alexander Evseev <email address hidden>
Date: Wed Mar 23 10:19:48 2016

Rename variable containing OpenStack version

Change-Id: I54846b6405be24710fb7e8233bd9c6757c8e8801
Closes-Bug: #1560905

[Alexander Kislitsky (akislitsky)]

OPENSTACK_RELEASE should be set accordingly to value of release name from the [0] to "ubuntu 14.04"
The release is matched by the name substring in the [1], but nailgun returns the releases in the reversed order [2]
Thus we can't use "ubuntu" value for OPENSTACK_RELEASE, due Ubuntu+UCA release is latest ubuntu release.

[0] https://github.com/openstack/fuel-web/blob/master/nailgun/nailgun/fixtures/openstack.yaml#L1949
[1] https://github.com/openstack/fuel-qa/blob/c05866763918f04fb454e3015ecae26e3244ab67/fuelweb_test/models/nailgun_client.py#L198-L201
[2] https://github.com/openstack/fuel-web/blob/master/nailgun/nailgun/api/v1/handlers/release.py#L50

[Alexander Kislitsky (akislitsky)]

Value 'ubuntu' is appropriate for OPENSTACK_RELEASE due to workaround [0] in the fuel-qa

[0] https://github.com/openstack/fuel-qa/blob/c05866763918f04fb454e3015ecae26e3244ab67/fuelweb_test/settings.py#L77-L79