Added warn on errors

Author: alex268

jdbc/ydb-token-app/src/main/java/tech/ydb/apps/Application.java

@@ -199,7 +199,7 @@ private void workload(RateLimiter rt, long finishAt) {
                 }
             } catch (RuntimeException ex) {
                 ticker.incrementFaiture();
-                logger.debug("got exception {}", ex.getMessage());
+                logger.warn("got exception {}", ex.getMessage());
             }
         }
     }