GeneratorFilters change INFO messages to DEBUG

There are INFO messages in several generator filters that would be better as DEBUG. Also, the formatting of the messages is fixed to be more readable.

Generators/GeneratorFilters/src/MultiElecMuTauFilter.cxx

 /*
-  Copyright (C) 2002-2021 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
 */
 
 #include "GeneratorFilters/MultiElecMuTauFilter.h"
@@ -101,12 +101,12 @@ StatusCode MultiElecMuTauFilter::filterEvent() {
  bool passed_event = false;
   if (m_TwoSameSignLightLeptonsOneHadTau) {
     if ( ((numLightLeptons+numHadTaus)==numLeptons) && numLightLeptons == 2 && numHadTaus == 1 && charge1==charge2 ) {
-      ATH_MSG_INFO("Found " << numLeptons << " Leptons: two same sign ligh leptons + one hadronic tau! Event passed.");
+      ATH_MSG_DEBUG("Found " << numLeptons << " Leptons: two same sign ligh leptons + one hadronic tau! Event passed.");
       passed_event = true;
     }
   } else {
     if ( numLeptons >= m_NLeptons ) {
-      ATH_MSG_INFO("Found " << numLeptons << "Leptons. Event passed.");
+      ATH_MSG_DEBUG("Found " << numLeptons << " Leptons. Event passed.");
       passed_event = true;
     }
   }