release/21.0.54.1

Tamara Vazquez Schroeder

@tvazquez

6deeaa88 · Merge branch 'cherry-pick-f850582f [formerly 48e94b66]-21.0-mc16d' into '21.0-mc16d' · Jan 14, 2018

Tier0 release built from 21.0-mc16d branch to be used for 5 TeV and low mu 13 TeV 2017 reprocessing.