feature and small refactoring

change order in BenchmarkJobManager, JobManager
job deletion
state for disposed jobs
fix update of table with deleted job

DIrectory Chooser dialog

propagate directories to Synchronization

change signature constructObservableValue

allow cancel Job

address merge reguest notes:
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5610
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5615
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5580
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5582
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5583
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5584
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5585
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5599
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5623
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5644
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5652
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5653
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5655
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5659
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5673
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5674
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5676
https://code.it4i.cz/fiji/haas-java-client/merge_requests/15#note_5675

Error occured for same sessionid and jobid.
Solved with a pool of file transfer method