Add current cluster version info into fuel OSWL data

[Alexander Kislitsky]

We should snapshot cluster version into OSWL on the OSWL creation moment. In other case we will have current on the report generation moment version info for OSWL.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/257879

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/257883

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/257879
Committed: https://git.openstack.org/cgit/openstack/fuel-stats/commit/?id=c1fe2d34d9c3d8200383e55a342c5d9ea56ec5ad
Submitter: Jenkins
Branch: master

commit c1fe2d34d9c3d8200383e55a342c5d9ea56ec5ad
Author: Alexander Kislitsky <email address hidden>
Date: Tue Dec 15 15:32:13 2015 +0300

    Version info handled for OSWLs

    Version info data handled for OpenStackWorkloadStats. If master node
    updated and the version info in InstallationStructure changed we have
    correct version info in OSWLs stats report.

    Fixes in collector:

    - version_info added to DB model
    - version_info added to API protocol
    - tests for version_info added

    Fixes in analytics:

    - version_info added to DB model
    - version_info fields added to CSV
    - field installation structure release info removed from CSV
    - version_info building on the fly for old OSWLs added

    Partial-Bug: #1525902
    Change-Id: I27d9d65517b4d5a7c6125b889fb0d1ba1ea213cf

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/257883
Committed: https://git.openstack.org/cgit/openstack/fuel-web/commit/?id=4d2700b173fc9c8e27710338627d8bbb607e96aa
Submitter: Jenkins
Branch: master

commit 4d2700b173fc9c8e27710338627d8bbb607e96aa
Author: Alexander Kislitsky <email address hidden>
Date: Tue Dec 15 15:58:17 2015 +0300

    Version info added to OSWL

    We are saving current Fuel and OpenStack version into OpenStackWorkloadStats.
    It prevents us to loose information which versions of Fuel and OpenStack were
    installed on the moment of OSWL creation.

    Closes-Bug: #1525902
    Depends-On: I27d9d65517b4d5a7c6125b889fb0d1ba1ea213cf
    Change-Id: I1b824bad3063fb4a622c6aae396a683758fa6df5

[Andrey Sledzinskiy (asledzinskiy)]

Nailgun part was checked, collector part wasn't, need to update staging collector to check it

[Andrey Sledzinskiy (asledzinskiy)]

verified on http://fuel-stats-testing.vm.mirantis.net/reports.html