Fix evaluation of function arguments for FormulaEvaluator

[Dr15Jones]

The FormulaEvaluator was not using the proper evaluator for the argument
passed to a function if the argument was a complex expression.
Added unit tests for the failing cases.

[cmsbuild]

A new Pull Request was created by @Dr15Jones (Chris Jones) for CMSSW_8_0_X.

It involves the following packages:

CommonTools/Utils

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

cms-bot commands are list here #13028

[Dr15Jones]

This is a proper backport of #13890

[Dr15Jones]

please test

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/12177/console

[cmsbuild]

+1
Tested at: bf61588
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13937/12177/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13937/12177/summary.html

[slava77]

@cmsbuild please test
most of the comparison jobs didn't complete the last time (probably due to some file copy failures)

[cmsbuild]

The tests are being triggered in jenkins.
https://cmssdt.cern.ch/jenkins/job/ib-any-integration/12219/console

[cmsbuild]

+1
Tested at: bf61588
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13937/12219/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-13937/12219/summary.html

[slava77]

+1

for #13937 bf61588

• code change is needed to integrate new parameterization of JEC
• the same set of changes as in 81X PR Fix evaluation of function arguments for FormulaEvaluator #13890
• jenkins tests pass and comparisons with baseline show no differences