inner DMP-6115 fixed: show which file cause error in dry-run.

[dcy10000]

• dble version：3.20.07.0
• preconditions ：

1. an xml with wrong syntax.

• configs：
  user.xml
  notice: the blacklist->name value is missing

<?xml version="1.0"?>
<!DOCTYPE dble:user SYSTEM "user.dtd">
<dble:user xmlns:dble="http://dble.cloud/" version="4.0">
    <managerUser name="root" password="******" ></managerUser>
    <shardingUser name="test2" schemas="testdb2" password="******" usingDecrypt="false"  readOnly="false" maxCon="800"></shardingUser>
    <blacklist name="">
        <property name="alterTableAllow">false</property>
    </blacklist>
</dble:user>

• steps：
  step1. use the user config with the wrong syntax as listed above.
  step2. run dry-run command.

• expect result：
  Show which config file cause the error.
  The response like this.
  [/user.xml] occurred parse errors, The detailed errors are as follows .org.xml.sax.SAXParseException; lineNumber: 13; columnNumber: 31; Attribute value "" of type NMTOKEN must be a name token.

• real result：
  Doesn't know which config file causes the error.
  The reponse like this.
  org.xml.sax.SAXParseException; lineNumber: 13; columnNumber: 31; Attribute value "" of type NMTOKEN must be a name token.