Limit dependency on CGAL library to RecoHI/HiJetAlgos plugin

[Dr15Jones]

The CGAL library causes problems with valgrind therefore we want to
limit its exposure. Moving the dependency out of RecoHI/HiJetAlgos
avoids having other libraries with link to that one having unneeded
dependencies to CGAL. The only module which actually needs to link
to CGAL is VoronoiBackgroundProducer.

[Dr15Jones]

This should allow valgrind to function again for non HI jobs.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_7_4_X.

Limit dependency on CGAL library to RecoHI/HiJetAlgos plugin

It involves the following packages:

RecoHI/HiJetAlgos

@cmsbuild, @cvuosalo, @nclopezo, @slava77 can you please review it and eventually sign? Thanks.
@yslai, @jazzitup, @richard-cms, @appeltel, @yenjie, @kurtejung, @mandrenguyen, @dgulhan, @yetkinyilmaz this is something you requested to watch as well.
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[Dr15Jones]

please test

[cmsbuild]

The tests are being triggered in jenkins.

[cvuosalo]

+1

For #8215 dc8d983

This PR makes changes in compiling and linking to reduce dependence on the CGAL library. It should not affect program outputs or physics quantities.

The Jenkins tests are OK and show no differences from the baseline.

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_4_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