fix pydata loading problem, ported from 6_2_X

[mkirsano]

No description provided.

[cmsbuild]

A new Pull Request was created by @mkirsano for CMSSW_7_0_X.

fix pydata loading problem, ported from 6_2_X

It involves the following packages:

GeneratorInterface/PartonShowerVeto

@vciulli, @cmsbuild, @Degano, @bendavid, @nclopezo 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.

[vciulli]

+1

[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-2009/2046/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?

[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?

[davidlange6]

+1