Amend HBASE-21048 Get LogLevel is not working from console in secure environment

Addenum fix for compile error.

Signed-off-by: Andrew Purtell <apurtell@apache.org>

hbase-server/src/test/java/org/apache/hadoop/hbase/http/log/TestLogLevel.java

@@ -267,7 +267,6 @@ public class TestLogLevel {
         }
       });
     } finally {
-      clientUGI.logoutUserFromKeytab();
       server.stop();
     }