bugfix: fix ReflectionUtil throw unexpected exception

[wangliang181230]

bugfix:

fix ReflectionUtil.invokeMethod will be invoke method multiple times, and fix the exception was lost when the method throws an exception

错误修复：

修复ReflectionUtil.invokeMethod方法的两个异常case：

1. 业务方法抛出异常时，异常被吞，最终抛出的是NoSuchMethodException异常
   （预期：应该抛出包装了业务异常的InvocationTargetException异常）
2. 业务方法被调用多次，满足以下两个条件会出现这个BUG：
   1）业务方法抛出异常
   2）业务类的superClass也有该方法。

其他优化：

1. 重构了ReflectionUtil工具类的代码。

---

BUG的根本原因：

InvocationTargetException异常处理不当。

---

bug-1 复现代码：

// Service1.java
public class Service1 {

    public void test() {
        throw new RuntimeException("业务出错，抛出了异常");
    }

}

// Test1.java
public class Test1 {
    public static void main(String[] args) throws Exception {
        Service1 s = new Service1();
        ReflectionUtil.invokeMethod(s, "test"); // 查看控制台打印的异常信息是否为`InvocationTargetException`，如果不是，说明是有问题的。
    }
}

bug-2 复现代码：

// Service2.java
public class Service2 extends SuperService2 {
    private int i = 0;

    @Override
    public void plusOne() {
        i++;
        throw new RuntimeException("业务出错，抛出了异常");
    }

    public int getI() {
        return i;
    }
}

// SuperService2.java
public abstract class SuperService2 {
    abstract void plusOne();
}

// Test2.java
public class Test2 {
    public static void main(String[] args) throws Exception {
        Service s = new Service();
        try {
            ReflectionUtil.invokeMethod(s, "plusOne");
        } catch (Exception e) {
            e.printStackTrace();
        }
        System.out.println("i = " + s.getI()); // 查看输出结果是否为`i = 1`，如果不是，说明是有问题的。
    }
}

[codecov-commenter]

Codecov Report

Merging #3803 (8991997) into develop (119f6eb) will decrease coverage by 0.06%.
The diff coverage is 46.52%.

@@              Coverage Diff              @@
##             develop    #3803      +/-   ##
=============================================
- Coverage      40.72%   40.65%   -0.07%     
- Complexity      3005     3032      +27     
=============================================
  Files            676      677       +1     
  Lines          22660    22745      +85     
  Branches        2814     2831      +17     
=============================================
+ Hits            9228     9247      +19     
- Misses         12581    12633      +52     
- Partials         851      865      +14     

Impacted Files	Coverage Δ
...src/main/java/io/seata/common/util/ArrayUtils.java	0.00% <0.00%> (ø)
.../src/main/java/io/seata/common/util/BeanUtils.java	67.12% <33.33%> (ø)
...main/java/io/seata/common/util/ReflectionUtil.java	59.71% <50.00%> (-34.89%)	⬇️
...rc/main/java/io/seata/common/util/StringUtils.java	28.63% <71.42%> (+2.05%)	⬆️

[wangliang181230]

review提示：
当前方法不应该读取静态字段，以及java自己生成的字段。

[caohdgege]

LGTM

[slievrly]

LGTM