[OSTF] Add logging for tests statuses

[Tatyanka]

Please, add next info in logging
Test name, test start time and tests status(success, error, fail)
In case if test error or fail add fail messages

[Dima Shulyak (dshulyak)]

We can configure python logger to write to separate files with names like:

/var/log/ostf/smoke_1_10.log - where 1 is nailgun cluster id, and ostf 10 is test run id

Also human readable name for test can be added to logs, it is not a problem I think

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/107937

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/107938

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sebastian Kalinowski (<email address hidden>) on branch: master
Review: https://review.openstack.org/107937
Reason: As suggested by Dima Shulyak, new dir will be created by puppet

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/108960

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/108960
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=9684cf5ff5155c1b1d18534a09c815616a0ff072
Submitter: Jenkins
Branch: master

commit 9684cf5ff5155c1b1d18534a09c815616a0ff072
Author: Sebastian Kalinowski <email address hidden>
Date: Wed Jul 23 13:35:43 2014 +0200

    Add dir for OSTF test result logs

    Change-Id: Ie512e1eb4d5d2b7b319d2e3f3122f68cf6e84eea
    Partial-Bug: #1297958

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/107938
Committed: https://git.openstack.org/cgit/stackforge/fuel-ostf/commit/?id=727cd3cc93e255635fef13c80baee649ced075be
Submitter: Jenkins
Branch: master

commit 727cd3cc93e255635fef13c80baee649ced075be
Author: Sebastian Kalinowski <email address hidden>
Date: Fri Jul 18 11:15:59 2014 +0200

    Add logging to file for OSTF tests

    After that change when performing a OSTF test its result will be
    logged to a file under /var/log/ostf directory.
    Each file has name in format cluseter_CLUSTER_ID_TESTSET.log,
    for example: cluster_1_smoke.log

    * added ResultsLogger for logging tests restuts
    * removed deprecation because of wrong import in models

    Change-Id: If69a4292fcc66565ba969396d591e38eddba92ce
    Closes-Bug: #1297958