Port Fireworks changes from 72x to 73x

[alja]

Synchronize Fireworks/Core directories.
Next time do this with cherry-pick.

[alja]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_3_X IBs unless changes or unless it breaks tests.

[cmsbuild]

A new Pull Request was created by @alja (Alja Mrak-Tadel) for CMSSW_7_3_X.

Port Fireworks changes from 72x to 73x

It involves the following packages:

Fireworks/Core
Fireworks/FWInterface

@cmsbuild, @alja, @Dr15Jones, @ktf, @nclopezo can you please review it and eventually sign? Thanks.
You can sign-off by replying to this message having '+1' in the first line of your reply.
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@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[cmsbuild]

Pull request #6124 was updated. @cmsbuild, @alja, @Dr15Jones, @ktf, @nclopezo can you please check and sign again.

[alja]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_3_X IBs unless changes or unless it breaks tests.

[cmsbuild]

+1
Tested at: f505ab0
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6124/532/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_3_X IBs unless changes (tests are also fine). This pull request will be automatically merged.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-6124/532/summary.html