release/21.5.10

Pedro Teixeira-Dias

@pedro

97645cdc · Merge branch 'updateTrigMC_to_21.1_2018-10-21' into '21.0-TrigMC' · Oct 23, 2018

This release from the 21.0-TrigMC branch is for HI MC production. For more information see the JIRA tickets ATLHI-226 and ATLHI-220.