New GTs for Run1 and Run2 simulations and data (including HLT)

[diguida]

New Global Tags for running the new features in 73X. Removes also the customisation for L1T conditions in Condition DB v2.
This is a forward port of #5662

[cmsbuild]

A new Pull Request was created by @diguida (Salvatore Di Guida) for CMSSW_7_3_X.

New GTs for Run1 and Run2 simulations and data (including HLT)

It involves the following packages:

Configuration/AlCa

@cmsbuild, @diguida, @rcastello, @cerminar, @nclopezo can you please review it and eventually sign? Thanks.
@ghellwig 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.

[cmsbuild]

+1
Tested at: 198efe0
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-5725/209/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-5725/209/summary.html

[diguida]

This is now automatically forward ported by #5738 Closing.