PDI-9790 - Job finishes successfully even though the logging process falls over

Unit tests moved to global test folder, test execution added to ant
tests-blackbox task
PDI-9790 - Job finishes successfully even though the logging process

Spoon metrics tab refresh interval is 2 seconds now.
PDI-9790 - Job finishes successfully even though the logging process

fix for write Log exception errors.
Merge pull request #258 from prakapenka/PDI-9790

PDI-9790 - Job finishes successfully even though the logging process falls over