fix bug: resolve config file in jar using getResourceAsStream

Author: huzhenyuan

src/main/java/org/tron/core/config/Configuration.java

@@ -59,13 +59,10 @@ public static com.typesafe.config.Config getByFileName(final String shellConfFil
   private static void resolveConfigFile(String fileName, File confFile) {
     if (confFile.exists()) {
       config = ConfigFactory.parseFile(confFile);
-    } else {
-      try {
-        ResourceUtils.getFile("classpath:" + fileName);
-      } catch (FileNotFoundException e) {
-        throw new IllegalArgumentException("Configuration path is required! No Such file " + fileName);
-      }
+    } else if (Thread.currentThread().getContextClassLoader().getResourceAsStream(fileName) != null) {
       config = ConfigFactory.load(fileName);
+    } else {
+      throw new IllegalArgumentException("Configuration path is required! No Such file " + fileName);
     }
   }
 }