Fix macros changes detection

Author: jackal1-66

MC/config/PWGGAJE/external/generator/generator_pythia8_powheg.C

@@ -239,4 +239,4 @@ FairGenerator *getGeneratorJEPythia8POWHEG(std::string powhegconf = "pwgpath", s
     myGen->setConfig(pythia8conf);
   }
   return myGen;
-}
+}

test/run_generator_tests.sh

@@ -161,8 +161,11 @@ add_ini_files_from_macros()
     # given a list of macros, collect all INI files which contain at least one of them
     local macro_files=$@
     for mf in ${macro_files} ; do
-        # if any, strip the leading O2DPG_ROOT path to only grep for the relative trailing path
-        mf=${mf##${O2DPG_ROOT}/}
+        # Strip anything before MC/config/, if any, to get the macro relative path
+        if [[ "${mf}" == *"MC/config"* ]] ; then
+            mf=${mf#*MC/config/}
+            mf="MC/config/${mf}"
+        fi
         local other_ini_files=$(grep -r -l ${mf} | grep ".ini$")
         # so this macro is not included in any of the INI file,
         # maybe it is included by another macro which is then included in an INI file