add sigmaietaiphi for photon regression inputs (75X)

[fcouderc]

backport of 76X #11276

[lgray]

@cmsbuild please test

[cmsbuild]

The tests are being triggered in jenkins.

[cmsbuild]

A new Pull Request was created by @fcouderc for CMSSW_7_5_X.

add sigmaietaiphi for photon regression inputs (75X)

It involves the following packages:

RecoEgamma/EgammaTools

@cmsbuild, @cvuosalo, @slava77 can you please review it and eventually sign? Thanks.
@Sam-Harper, @lgray this is something you requested to watch as well.
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@Degano you are the release manager for this.
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[cmsbuild]

+1
Tested at: 22a0f9e
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-11281/8121/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-11281/8121/summary.html

[slava77]

+1

for #11281 22a0f9e

• this is a clear bugfix; the fix affects correctedEnergy of pat photons if modifiers are running (there are no DQM miniAOD validation plots for photons, as far as I can see)
• jenkins tests pass and comparisons with baseline show no differences (as expected)

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs once checked with relvals in the development release cycle of CMSSW (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @Degano, @smuzaffar

[davidlange6]

+1