MINIAOD: reducing packedMETunceratinty to float16 on top of #8219

[arizzi]

This PR reduce the size of packedMETuncertainty by using float16 as persistent format.

same as #8208 for 75X
based on #8219

[cmsbuild]

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

MINIAOD: reducing packedMETunceratinty to float16 on top of #8219

It involves the following packages:

DataFormats/PatCandidates
PhysicsTools/PatAlgos
PhysicsTools/PatUtils

@cmsbuild, @vadler, @nclopezo, @monttj can you please review it and eventually sign? Thanks.
@rappoccio, @imarches, @ahinzmann, @acaudron, @mmarionncern, @jdolen, @nhanvtran, @schoef, @ferencek, @mariadalfonso, @pvmulder, @TaiSakuma 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.
If you are a L2 or a release manager you can ask for tests by saying 'please test' in the first line of a comment.
@nclopezo 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: 78ddc2d
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8354/7130/summary.html

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-8354/7130/summary.html
There are some workflows for which there are errors in the baseline:
401.0 step 1
The results for the comparisons for these workflows could be incomplete
This means most likely that the IB is having errors in the relvals

[monttj]

+1

[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