[KYUUBI #1931] AbstractSession._lastIdleTime should be reset in acq…

…uire method

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### _Why are the changes needed?_
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`AbstractSession._lastIdleTime` should be reset in acquire method.

### _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

- [x] [Run test](https://kyuubi.apache.org/docs/latest/develop_tools/testing.html#running-tests) locally before make a pull request

Closes #1934 from SteNicholas/KYUUBI-1931.

Closes #1931

cbbd92e [SteNicholas] [KYUUBI #1931] AbstractSession._lastIdleTime should be reset in acquire method.

Authored-by: SteNicholas <programgeek@163.com>
Signed-off-by: Cheng Pan <chengpan@apache.org>

kyuubi-common/src/main/scala/org/apache/kyuubi/session/AbstractSession.scala

@@ -58,6 +58,7 @@ abstract class AbstractSession(
     if (userAccess) {
       _lastAccessTime = System.currentTimeMillis
     }
+    _lastIdleTime = 0
   }
 
   private def release(userAccess: Boolean): Unit = {
@@ -66,8 +67,6 @@ abstract class AbstractSession(
     }
     if (opHandleSet.isEmpty) {
       _lastIdleTime = System.currentTimeMillis
-    } else {
-      _lastIdleTime = 0
     }
   }