[KYUUBI #744] Log update

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### _Why are the changes needed?_
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1. add '=' in start of line to keep the consistent code style.
2. update log info to correct position.
### _How was this patch tested?_
- [ ] Add some test cases that check the changes thoroughly including negative and positive cases if possible

- [ ] Add screenshots for manual tests if appropriate

- [ ] [Run test](https://kyuubi.readthedocs.io/en/latest/tools/testing.html#running-tests) locally before make a pull request

Closes #744 from zhaomin1423/log_update.

Closes #744

bf1e0d8a [Min Zhao] update log 'Closing ...' to corrent position and add 'Closed...'
6907430f [Min Zhao] update log info to keep the consistent code style

Authored-by: Min Zhao <zhaomin1423@163.com>
Signed-off-by: Kent Yao <yao@apache.org>

kyuubi-common/src/test/scala/org/apache/kyuubi/ThreadAudit.scala

@@ -36,7 +36,7 @@ trait ThreadAudit extends Logging {
           s"thread names: ${remainingThreadNames.mkString(", ")} =====\n")
       }
     } else {
-      warn(s"\n\n= THREAD AUDIT POST ACTION CALLED WITHOUT PRE ACTION IN SUITE $shortName ==\n")
+      warn(s"\n\n== THREAD AUDIT POST ACTION CALLED WITHOUT PRE ACTION IN SUITE $shortName ==\n")
     }
   }
 

kyuubi-common/src/test/scala/org/apache/kyuubi/operation/JDBCTestUtils.scala

@@ -79,8 +79,9 @@ trait JDBCTestUtils extends KyuubiFunSuite {
       info("Closing statements")
       statements.foreach(_.close())
       info("Closed statements")
-      connections.foreach(_.close())
       info("Closing connections")
+      connections.foreach(_.close())
+      info("Closed connections")
     }
   }