74x version of added ctors to fix failing unit-test in root6 branch

[apfeiffer1]

the 75x version of this is #7892
As requested by @davidlange6, here is the same PR for the 74x mainstream.

[cmsbuild]

A new Pull Request was created by @apfeiffer1 (Andreas Pfeiffer) for CMSSW_7_4_X.

74x version of added ctors to fix failing unit-test in root6 branch

It involves the following packages:

CondFormats/L1TObjects

@diguida, @cerminar, @cmsbuild, @nclopezo, @ggovi, @mmusich, @mulhearn can you please review it and eventually sign? Thanks.
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@Degano you are the release manager for this.
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[cmsbuild]

+1
Tested at: fa35b42
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7921/2922/summary.html

[cmsbuild]

+1
Tested at: fa35b42
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7921/2932/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-7921/2932/summary.html

[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