Fix when unschedule mode and customise_command are used together

[srimanob]

customise_commands will fail in unschedule mode because it's called before the module is load.

https://github.com/cms-sw/cmssw/blob/CMSSW_7_2_X/Configuration/Applications/python/ConfigBuilder.py#L2211-L2226

For example,
cmsDriver.py step3 --filein file:MUO-Phys14DR-00003_step2.root --fileout file:MUO-Phys14DR-00003.root --mc --eventcontent MINIAODSIM --runUnscheduled --datatier MINIAODSIM --conditions PHYS14_25_V1 --customise_commands 'process.patJetPartons.partonMode = cms.string("Pythia6")' --step PAT --python_filename MUO-Phys14DR-00003_3_cfg.py --no_exec --customise Configuration/DataProcessing/Utils.addMonitoring -n 20

[cmsbuild]

A new Pull Request was created by @srimanob (Phat Srimanobhas) for CMSSW_7_2_X.

Fix when unschedule mode and customise_command are used together

It involves the following packages:

Configuration/Applications

@cmsbuild, @franzoni, @nclopezo, @davidlange6 can you please review it and eventually sign? Thanks.
@ghellwig this is something you requested to watch as well.
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@nclopezo you are the release manager for this.
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[davidlange6]

I think we can replace the two ifs with the same set of commands by

if unsch==1 or not self._options.runUnscheduled:

?

[srimanob]

Thanks David.
Fix as you suggest.

[cmsbuild]

Pull request #6492 was updated. @cmsbuild, @franzoni, @nclopezo, @davidlange6 can you please check and sign again.