Merge pull request #17 from lexplua-y/master

Adding callbacks after restore from backup
Merge pull request #18 from lexplua-y/master

packetNames -> packetNamesTracker
Merge pull request #19 from lexplua-y/master

Add correct tag reset and tests
Merge pull request #20 from lexplua-y/master

Fix sendmail cycle
Merge pull request #21 from lexplua-y/master

Add defaul parameter to pck_addto_queue
adds TagLogger.Clear calls logging
Bug-fix: wrong constant name
1. Bug-fix in IResult: from now on IResult.code can be None
2. Bug-fix in job._wait_process: process.poll() may return None after process.kill
Bug-fixes:
  1. Error converting timestamp to string in TimeOutExceededResult
  2. In T02.testMovePacket: queue should be created before usage
  3. In T09.testTagDuplication: added waiting for packets completion before checking tags
last_update_time move to local
fix slow test