TCT: Adding new MC test for Run2 reprocessing
This MR adds one new TCT test based on a recent MC Run2 Reprocessing task https://bigpanda.cern.ch/task/27175309/
This is to ensure we can follow the Frozen Tier0 Policy.
Thanks to @jferrand for the help setting up this test! Tagging also @tadej and @elmsheus. Please let me know if you have any suggestion or proposal for other MC tests relevant to Run2 Reprocessing of MC.