script to run tempest remotely:
 fix bug: junitxml may be not installed
 fix bug: testr repo may not be activated
enhancement: change err printing in case xml and subunit reports not found
enhancement: use run_tempest.sh with possibility to run versus venv
Merge pull request #64 from kshileev/tempest-runner

script to run tempest remotely:
fixes
fixes
fixes
fixes
Fixes