Increase memory needed to run MooPerformance ART tests
Hi,
since the MooPerformance ART tests seem to fail due to too low memory on the grid sites (cf. https://bigpanda.cern.ch/art/jobs/?package=MooPerformance&branch=master--py3/Athena/x86_64-centos7-gcc8-opt&ntag_full=2020-07-05T2136&view=packages), let's increase it.
Best, Nico