Add MET menu ctest

Trigger/TrigValidation/TrigUpgradeTest/share/met_menu.ref

+TrigSignatureMoniMT                                INFO HLT_xe30_L1XE10               50        50        30        30        
+TrigSignatureMoniMT                                INFO HLT_xe30_L1XE10 decisions                         30        
+TrigSignatureMoniMT                                INFO HLT_xe65_L1XE50               50        50        7         7         
+TrigSignatureMoniMT                                INFO HLT_xe65_L1XE50 decisions                         7         

Trigger/TrigValidation/TrigUpgradeTest/test/test_met_standalone.sh

@@ -2,5 +2,5 @@
 # art-type: build
 # art-ci: master
 
-athena --threads=1 --evtMax=10 --filesInput="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/TrigP1Test/data17_13TeV.00327265.physics_EnhancedBias.merge.RAW._lb0100._SFO-1._0001.1" TrigUpgradeTest/metTest.py 
+athena --threads=1 --evtMax=10 --filesInput="/cvmfs/atlas-nightlies.cern.ch/repo/data/data-art/TrigP1Test/data17_13TeV.00327265.physics_EnhancedBias.merge.RAW._lb0100._SFO-1._0001.1" TrigUpgradeTest/met.menu.py