TriggerMenuMT: python 2 compatibility.

Fix uses of f"" and super() to work with py2.

Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/MET/AlgConfigs.py

 #
-#  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+#  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 #
 
 from .ConfigHelpers import AlgConfig, jetRecoDictForMET
@@ -233,7 +233,7 @@ class CVFPufitConfig(AlgConfig):
         return "cvfpufit"
 
     def __init__(self, **recoDict):
-        super().__init__(**recoDict)
+        super(CVFPufitConfig, self).__init__(**recoDict)
         from .METRecoSequences import cvfClusterSequence
         from TrigEFMissingET.TrigEFMissingETConf import (
             HLT__MET__CVFPrepAlg,
@@ -269,7 +269,7 @@ class MHTPufitConfig(AlgConfig):
         return "mhtpufit"
 
     def __init__(self, **recoDict):
-        super().__init__(**recoDict)
+        super(MHTPufitConfig, self).__init__(**recoDict)
         from ..Jet.JetRecoSequences import jetRecoSequence
         from ..Jet.JetRecoConfiguration import defineJets
         from TriggerMenuMT.HLTMenuConfig.CommonSequences.CaloSequenceSetup import (

Trigger/TriggerCommon/TriggerMenuMT/python/HLTMenuConfig/MET/METRecoSequences.py

 #
-#  Copyright (C) 2002-2019 CERN for the benefit of the ATLAS collaboration
+#  Copyright (C) 2002-2020 CERN for the benefit of the ATLAS collaboration
 #
 
 
@@ -82,7 +82,7 @@ def cvfClusterSequence(dummyFlags, RoIs, **recoDict):
             LCCaloClusterRecoSequence, flags=None, RoIs=RoIs
         )
     else:
-        raise ValueError(f"Unsupported calib state {calib} requested!")
+        raise ValueError("Unsupported calib state %s requested!" % calib)
 
     trkopt = "ftf"
     trackSeq, trackColls = RecoFragmentsPool.retrieve(