Replacement of TMatrix and TVector by SMatrix and SVector in MET code

[mmarionncern]

Removed any instance of TMatrix and TVector in benefit to SMatrix and SVector in the MET significance code and MET code, used to keep the covariance matrix.
An extra typedef has been declared in DataFormat/METReco/interface/MET.h to standardize the definition of the MET covariance matrix.

This PR is necessary to complete the PR #5388

[cmsbuild]

A new Pull Request was created by @mmarionncern for CMSSW_7_3_X.

Replacement of TMatrix and TVector by SMatrix and SVector in MET code

It involves the following packages:

DataFormats/METReco
FWCore/Framework
FWCore/ParameterSet
FWCore/PluginManager
RecoMET/METAlgorithms

@nclopezo, @cmsbuild, @Dr15Jones, @StoyanStoynev, @slava77, @ktf can you please review it and eventually sign? Thanks.
@TaiSakuma, @schoef, @nhanvtran, @wddgit, @wmtan this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
@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.

[StoyanStoynev]

@mmarionncern can you test your changes with latest 73X IB? I get
9 files changed, 50 insertions(+), 48 deletions(-)
with CMSSW_7_3_X_2014-09-18-0200 vs yours
12, +65, −54 . Probably you have to rebase. Let me know.

[StoyanStoynev]

Also, can you prepare a PR for 72X too, it seems offline would like to push for 72X after all.

[cmsbuild]

+1
Tested at: 6906d27
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-5417/10/summary.html

[mmarionncern]

I think I am not doing the proper actions with the rebase... What should I do to make it working?

[mmarionncern]

Following the tutorial for the forward-porting, it appears that after the rebase, the git push command tells me everything is up to date, so with no action taken...
I am probably missing something stupid, but I don't see what I am doing wrong.

[StoyanStoynev]

I am not a git guru but I'll try to resolve it - leave that to me for now and work on the other stuff.

[StoyanStoynev]

False alarm - now with CMSSW_7_3_X_2014-09-19-0200 I get exactly what I should. I'll test with this version.

[cmsbuild]

+1
Tested at: c6b1b0b
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-5417/25/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-5417/25/summary.html

[StoyanStoynev]

+1
For c6b1b0b. Identical to #5440 (for 72X) - see the review there. Jenkins here show some known (previously observed) irreproducibility issues and nothing more. This PR (transition to SMatrix in the MET code) is needed for #5388 .

[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). @nclopezo, @ktf can you please take care of it?