deprecate --numcores option for crab resubmit

[belforte]

1. it does not work . ref
2. it makes no sense. We enforce that numCores is equal to numThreads in PSet and PSet can't be changed at resubmit time.

It is not a matter of "giving a few jobs a kick" like with --maxmemory or --maxjobruntime

[belforte]

Hi @aspiringmind-code . I think it is good for you to start putting your hands in CRABClient. Action is simple here: remove the option and all related code.
Starting point:

CRABClient/src/python/CRABClient/Commands/resubmit.py

Line 234 in 8b8da2a

self.parser.add_option('--numcores',

A bit more work will be to clean up by removing support for this option in CRAB Server and DagmanResubmitter

[aspiringmind-code]

@belforte On the CRABServer side, would we also like to remove tm_numcores column from the Task table?

[belforte]

of course not. num_cores is needed when submitting. Simply it can't be changed afterwards, like most of the values in the Task table.

[aspiringmind-code]

I see, understood.