Btag cond format

[cmsbuild]

DB file creation with cmsRun is the most significant change. Small adjustments apart from that.
Automatically ported from CMSSW_7_4_X #7633

[cmsbuild]

A new Pull Request was created by @cmsbuild for CMSSW_7_5_X.

Btag cond format

It involves the following packages:

CondFormats/BTauObjects
RecoBTag/PerformanceDB

@nclopezo, @cvuosalo, @cerminar, @cmsbuild, @diguida, @slava77, @ggovi, @mmusich can you please review it and eventually sign? Thanks.
@ferencek, @acaudron, @pvmulder, @imarches 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.
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[cmsbuild]

-1
@cmsbuild This pull request cannot be automatically merged, could you please rebase it?

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_5_X IBs unless changes (tests are also fine). This pull request requires discussion in the ORP meeting before it's merged. @davidlange6, @nclopezo, @ktf, @smuzaffar

[davidlange6]

+1