add support for multiProcesses cmsRun to the DQMFileSaver

[fwyzard]

Minimal patch to add support for "multiProcesses cmsRun" (i.e., forking children process from a cmsRun master) to the DQMFileSaver.

It adds _N to the the file names used by the DQM, using the ame logic as the PoolOutputModule.

The DQM files produced in this way should then be merged together to recover the original file name before begin loaded in the DQM GUI.

[cmsbuild]

A new Pull Request was created by @fwyzard (Andrea Bocci) for CMSSW_7_0_X.

add support for multiProcesses cmsRun to the DQMFileSaver

It involves the following packages:

DQMServices/Components

@nclopezo, @danduggan, @rovere, @cmsbuild, @deguio, @eliasron can you please review it and eventually sign? Thanks.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@ktf you are the release manager for this.

[deguio]

+1
[this is for the online]

[ktf]

@deguio gives his +1, but he has some identity problems at the moment. Once the tests will pass this will be integrated.

[deguio]

+1
hopefully I am back

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IBs unless changes or unless it breaks tests. @ktf can you please take care of it?

[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-1856/1831/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next IBs unless changes (tests are also fine). @ktf can you please take care of it?