test:加入配置显示功能

server/src/main/java/com/pica/cloud/online/exam/analysis/server/configuration/PropertiesConfiguration.java

@@ -119,7 +119,7 @@ public class PropertiesConfiguration {
 
     @Override
     public String toString() {
-        return "PropertiesConfiguration{" +
+        return "{" +
                 "userExpire='" + userExpire + '\'' +
                 ", guestExpire='" + guestExpire + '\'' +
                 ", fileUrl='" + fileUrl + '\'' +