Nuke: add concurrency attr to deadline job

[jakubjezek001]

Brief description

Adding support for ConcurrentTask Deadline Job attibute.

Description

Some productions might want to use Deadline feature for concurrent tasks on one Worker. This will allow to either set this in settings for Nuke submission or even let user to decide how many concurrent task he wants to use on Rendering node Deadline Tab.

Testing notes:

1. Make sure you are having Deadline Worker with at least some Concurrent task defined > Super user needs to be ON and RMB click on worker and go to Worker Settings/Concurrent Tasks. If zero is in it it will detect your maximum available threads and use it.
2. Open Settings and save on your project override. To to project_settings/deadline/publish/NukeSubmitDeadline/concurrent_tasks and define it to 5.
3. Open your favorite Nuke workfile.
4. Test 1 render publish with already created render node (this will not have available attribut in DeadlineTab, but we want to test even backward compatibilitiy)
5. Go to Deadline Monitor and look at the first job details and see if the Concurrent Task attribute is set to 5
6. Now remove the write render node and create new one.
7. go to Deadline Tab and set Concurrent Tasks to 6
8. Submit to farm and go to Monitor to the new job and see if it is set to 6

[ynbot]

Task linked: OP-2984 Nuke: add concurrency attr to deadline job

[BigRoy]

Haven't tested the code (don't use nuke myself) but code looks good to me.