HBASE-26219 Negative time is logged while waiting on regionservers (#3622)

Signed-off-by: Wei-Chiu Chuang <weichiu@apache.org>
Signed-off-by: Peter Somogyi <psomogyi@apache.org>
Signed-off-by: Duo Zhang <zhangduo@apache.org>

Author: lpalasthy

hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java

@@ -820,8 +820,9 @@ public void waitForRegionServers(MonitoredTask status) throws InterruptedExcepti
         lastLogTime = now;
         String msg =
             "Waiting on regionserver count=" + count + "; waited="+
-                slept + "ms, expecting min=" + minToStart + " server(s), max="+ getStrForMax(maxToStart) +
-                " server(s), " + "timeout=" + timeout + "ms, lastChange=" + (lastCountChange - now) + "ms";
+                slept + "ms, expecting min=" + minToStart + " server(s), max="
+                + getStrForMax(maxToStart) + " server(s), " + "timeout=" + timeout
+                + "ms, lastChange=" + (now - lastCountChange) + "ms";
         LOG.info(msg);
         status.setStatus(msg);
       }