Resolve BMK-975: use elapsed time instead of user time as metrci

Closes BMK-975 create version v2.0 of juno

juno/gen-sim-reco/juno-gen-sim-reco/CHANGELOG.md

+# Changelog for Juno gen-sim-reco
+
+## [Unreleased]
+
+## [v2.0] 2022-07-01
+- Modify the time report, using the walltime and not only the user time component of time (https://its.cern.ch/jira/browse/BMK-975)
+
+## [v1.1] 2021-12-16
+- First working release of Juno gen-sim-reco
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