Merge pull request #3786 from manan164/wait_task_test_fix

Wait until calculation fix.

core/src/main/java/com/netflix/conductor/core/execution/mapper/WaitTaskMapper.java

@@ -110,7 +110,7 @@ void setCallbackAfter(TaskModel task) {
                 Date expiryDate = parseDate(until);
                 long timeInMS = expiryDate.getTime();
                 long now = System.currentTimeMillis();
-                long seconds = ((timeInMS - now) / 1000) + 1;
+                long seconds = ((timeInMS - now) / 1000);
                 if (seconds < 0) {
                     seconds = 0;
                 }