correct emulator exit_code output in refEmulate file

refEmulate

@@ -85,7 +85,7 @@ files.each do |file_path|
       puts "-- Emulation Output:" 
       puts json['emulator_out']
       puts "---------------------------------------------------------------"
-      puts "The exit code is: #{exit_code}."
+      puts "The exit code is: #{json['emulator_exit']}."
       puts ""
     end
   end