Rel val74 x back port to71 x step2

[inugent]

Pull request to back-port the relval from 7_4/5_X to 7_1_X requested by Giovanni.

[cmsbuild]

A new Pull Request was created by @inugent for CMSSW_7_1_X.

Rel val74 x back port to71 x step2

It involves the following packages:

Configuration/Generator
Configuration/PyReleaseValidation
Validation/EventGenerator

@vciulli, @covarell, @bendavid, @danduggan, @boudoul, @franzoni, @thuer, @cmsbuild, @srimanob, @nclopezo, @deguio can you please review it and eventually sign? Thanks.
@ghellwig, @Martin-Grunewald this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
If you are a L2 or a release manager you can ask for tests by saying 'please test' in the first line of a comment.
@Degano you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[ghost]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @ktf, @smuzaffar

[davidlange6]

+1