fuel-devops should not use a common folder ~/.devops for colecting logs

[Dennis Dmitriev]

Problem description:

  fuel-devops creates a folder ~/.devops in the home directory of the current user, and places there log.yaml and log files.
- different versions of fuel-devops have a different configuration in the log.yaml
- different fuel-devops instances, installed in the different python virtual environments, shoud not mix it's logs in a single file.

Proposed solution:

- search for log.yaml in the folder where the fuel-devops installed (it is already copied there, but is not used)
- create log files in the LOGS_DIR or in the "${WORKSPACE}/logs" if LOGS_DIR is empty; instead of ~/.devops/logs , so that we could get these logs next to the fuel-qa system_test.log and archive fuel-devops logs along with other artifacts on CI for each job.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/320366
Committed: https://git.openstack.org/cgit/openstack/fuel-devops/commit/?id=1ec01a8ef10a9dbf8e12c81d8447e87c6ecb3c82
Submitter: Jenkins
Branch: release/2.9

commit 1ec01a8ef10a9dbf8e12c81d8447e87c6ecb3c82
Author: Serhii Boikov <email address hidden>
Date: Thu May 19 13:44:42 2016 +0300

    Logger and it's settings were moved into scripts.

    - Log.yaml has been removed.
    - All settings for logger have been moved into scripts.
    - Changed log.levels for some events to debug in libvirt_driver.py.
    - Added variables LOGS_DIR and LOGS_SIZE.
    - LOGS_DIR - EnvVar with path to the directory where devops logs are stored.
      Default path is ~/.devops
    - LOGS_SIZE - EnvVar with Size of devops log file(in bytes).
      Default size 10485760(10MB).

    Closes-Bug: #1546629
    Change-Id: Ia84841bce0deae419d5a0df3051a0339ce4b82b4

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/318578
Committed: https://git.openstack.org/cgit/openstack/fuel-devops/commit/?id=5f52bc270cb56138ae7358b3b8cd6c9ce5615177
Submitter: Jenkins
Branch: master

commit 5f52bc270cb56138ae7358b3b8cd6c9ce5615177
Author: Serhii Boikov <email address hidden>
Date: Thu May 19 13:44:42 2016 +0300

    Logger and it's settings were moved into scripts.

    - Log.yaml has been removed.
    - All settings for logger have been moved into scripts.
    - Changed log.levels for some events to debug in libvirt_driver.py.
    - Added variables LOGS_DIR and LOGS_SIZE.
    - LOGS_DIR - EnvVar with path to the directory where devops logs are stored.
      Default path is ~/.devops
    - LOGS_SIZE - EnvVar with Size of devops log file(in bytes).
      Default size 10485760(10MB).

    Closes-Bug: #1546629
    Change-Id: Ia84841bce0deae419d5a0df3051a0339ce4b82b4