Add missing Candidate.h/LeafCandidate.h includes to CandidateWithRef.h.

[Teemperor]

We inherit from LeafCandidate in CandidateWithRef and we use Candidate
in the overlap function, so we need those includes here.

[Teemperor]

This is part of the work going on for the issue #15248.

[cmsbuild]

A new Pull Request was created by @Teemperor (Raphael Isemann) for master.

It involves the following packages:

DataFormats/Candidate

@perrotta, @cmsbuild, @slava77, @monttj, @davidlange6 can you please review it and eventually sign? Thanks.
@gpetruc this is something you requested to watch as well.
@davidlange6 you are the release manager for this.

cms-bot commands are listed here

[slava77]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/19941/console Started: 2017/05/17 19:51

[cmsbuild]

+1
Tested at: b9c3d77
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-18763/19941/summary.html

[cmsbuild]

Comparison job queued.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-18763/19941/summary.html

Comparison Summary:

• No significant changes to the logs found
• Reco comparison results: 3368 differences found in the comparisons
• DQMHistoTests: Total files compared: 24
• DQMHistoTests: Total histograms compared: 1833867
• DQMHistoTests: Total failures: 34315
• DQMHistoTests: Total nulls: 0
• DQMHistoTests: Total successes: 1799372
• DQMHistoTests: Total skipped: 180
• DQMHistoTests: Total Missing objects: 0
• Checked 98 log files, 14 edm output root files, 24 DQM output files

[slava77]

+1

for #18763 b9c3d77

• technical
• jenkins tests pass