Avoid thread locals

[wmtan]

There are bugs in the handling of thread locals. This pull request replaces two thread local maps with non-thread local TBB concurrent unordered maps.

[cmsbuild]

A new Pull Request was created by @wmtan for CMSSW_7_1_X.

Avoid thread locals

It involves the following packages:

FWCore/Utilities

@cmsbuild, @Degano, @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.

[Dr15Jones]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes or unless it breaks tests. @nclopezo, @ktf can you please take care of it?

[cmsbuild]

+1
Tested at: baec0ff
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-4198/1677/summary.html

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_1_X IBs unless changes (tests are also fine). @nclopezo, @ktf can you please take care of it?

[ktf]

This was agreed in yesterday CoreSW meeting. Bypassing ORP approval. @davidlange6 .

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-4198/1677/summary.html