Updated root to tip of branch master

[ddaina]

No description provided.

[cmsbuild]

A new Pull Request was created by @ddaina (Daina) for branch IB/CMSSW_12_1_X/rootmaster.

@cmsbuild, @smuzaffar, @mrodozov, @iarspider can you please review it and eventually sign? Thanks.
@perrotta, @dpiparo, @qliphy you are the release manager for this.
cms-bot commands are listed here

[smuzaffar]

please test

[cmsbuild]

+1

Summary: https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-e11a52/17789/summary.html
COMMIT: 9a11085
CMSSW: CMSSW_12_1_ROOT6_X_2021-08-15-2300/slc7_amd64_gcc900
User test area: For local testing, you can use /cvmfs/cms-ci.cern.ch/week0/cms-sw/cmsdist/7212/17789/install.sh to create a dev area with all the needed externals and cmssw changes.

Comparison Summary

Summary:

• No significant changes to the logs found
• Reco comparison results: 6086 differences found in the comparisons
• DQMHistoTests: Total files compared: 39
• DQMHistoTests: Total histograms compared: 3000352
• DQMHistoTests: Total failures: 13812
• DQMHistoTests: Total nulls: 1
• DQMHistoTests: Total successes: 2986517
• DQMHistoTests: Total skipped: 22
• DQMHistoTests: Total Missing objects: 0
• DQMHistoSizes: Histogram memory added: -0.004 KiB( 38 files compared)
• DQMHistoSizes: changed ( 312.0 ): -0.004 KiB MessageLogger/Warnings
• Checked 165 log files, 37 edm output root files, 39 DQM output files
• TriggerResults: found differences in 2 / 38 workflows