add art-mem 6G to all tests and change test_reco_mc15_13tev_nopileup.sh to an older conditiona tag
Changes in RecJobTransformTests.
Add art-mem 6G to all tests. https://its.cern.ch/jira/browse/ATLASRECTS-5494 Change test_reco_mc15_13tev_nopileup.sh to an older condition tag. https://its.cern.ch/jira/browse/ATLASSIM-4536