Add missing dictionaries

[wmtan]

The ROOT team has written (in ROOT6) a routine to check for missing dictionaries for classes used persistently. While testing this routine, I found three missing dictionaries for persistent classes. This has not caused a problem, because all three classes are instances of std::vector, and root can usually handle std::vector without a dictionary if it has a dictionary for T. However, such handling is less efficient without a dictionary. This pull request adds the missing dictionaries.
This pull request is totally technical, so signatures should be bypassed if not signed in a reasonable amount of time.
I tested this pull request with the short relval matrix and saw no errors.

[cmsbuild]

A new Pull Request was created by @wmtan for CMSSW_7_2_X.

Add missing dictionaries

It involves the following packages:

DataFormats/EgammaCandidates
DataFormats/ParticleFlowCandidate

@nclopezo, @cmsbuild, @Degano, @StoyanStoynev, @slava77 can you please review it and eventually sign? Thanks.
@bachtis, @lgray 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.
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[cmsbuild]

+1
Tested at: 2f066c0
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-4361/177/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-4361/177/summary.html

[slava77]

+1

for #4361 2f066c0
jenkins OK

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_2_X IBs unless changes (tests are also fine).