Adding secondary vertex position to MiniAOD for non-IVF taggers

[arizzi]

This PR adds 6 user floats to jets with Secondary Vertex momentum and position.
The floats are zero most of the time (as most of the jets do not have vertices)

This is (probably) not needed in 72X and later release as IVF will be the new default for b-tagging.

[cmsbuild]

A new Pull Request was created by @arizzi for CMSSW_7_0_X.

Adding secondary vertex position to MiniAOD for non-IVF taggers

It involves the following packages:

PhysicsTools/PatAlgos

@cmsbuild, @vadler, @nclopezo, @monttj can you please review it and eventually sign? Thanks.
@nhanvtran, @TaiSakuma, @mmarionncern, @schoef 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.
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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.

[vadler]

+1

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_0_X IBs unless changes or unless it breaks tests. @nclopezo, @ktf can you please take care of it?