62X - fix metUncertaintyTools for scheduled processing

[vadler]

Backport of #3929

[cmsbuild]

A new Pull Request was created by @vadler (Volker Adler) for CMSSW_6_2_X.

62X - fix metUncertaintyTools for scheduled processing

It involves the following packages:

PhysicsTools/PatUtils

@nclopezo, @vadler, @cmsbuild, @Degano, @monttj can you please review it and eventually sign? Thanks.
@TaiSakuma, @nhanvtran 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.
@Degano you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[monttj]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_6_2_X IBs unless changes or unless it breaks tests. @Degano can you please take care of it?

[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-3931/75/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_6_2_X IBs unless changes (tests are also fine). @Degano can you please take care of it?