added toreassign to the list of active task status
enabled file check for transferring rucio_test
fixed killUnusedEventServiceConsumers not to kill running consumers
* removed priority reduction for ES retry
* changed datasetManager to kick stalled merging jobs
fixed Closer to update dataset status after unmerge datasets are updated
* check sub to reduce nFilesOnHold when merging is killed
* added protection to updateUmergeDataset to avoid concurrent update
* disabled updating nFilesOnHold by transferring for trn_*
Merge branch 'master' into rucio
fixed for analysis+rucio