Allow MEP files when downloading locally from TestFileDB
This is needed for the HLT1 throughput test using the testbench setup that tests the production setup of HLT1. The Online MEP reader doesn't support reading directly from EOS.
This is needed for the HLT1 throughput test using the testbench setup that tests the production setup of HLT1. The Online MEP reader doesn't support reading directly from EOS.