Pull request #6456: REPORT-77015 Druid连接失败时抛出的报错不方便直接查看原因，10.0是可以的

Merge in CORE/base-third from ~MAXIMUS/base-third:release/11.0 to release/11.0

* commit 'c80c28153a62f9be5e1d1c1dc098cd523b8a0080':
  REPORT-77015 Druid连接失败时抛出的报错不方便直接查看原因，10.0是可以的

fine-druid/src/main/java/com/fr/third/alibaba/druid/pool/DruidDataSource.java

@@ -1830,7 +1830,11 @@ public class DruidDataSource extends DruidAbstractDataSource implements DruidDat
             String errorMessage = buf.toString();
 
             if (createError != null) {
+                if (createError instanceof SQLException) {
+                    throw (SQLException)createError;
+                } else {
                     throw new GetConnectionTimeoutException(errorMessage, createError);
+                }
             } else {
                 throw new GetConnectionTimeoutException(errorMessage);
             }