Using a consistent Duration.of everywhere

ranger-core/src/test/java/com/flipkart/ranger/core/utils/RangerTestUtils.java

@@ -57,15 +57,15 @@ public static Service getService(String namespace, String serviceName){
         refreshed and other boolean flags throughout the code.
      */
     public static void sleepUntil(int numSeconds) {
-        await().pollDelay(numSeconds, TimeUnit.SECONDS).until(() -> true);
+        await().pollDelay(Duration.ofSeconds(numSeconds)).until(() -> true);
     }
 
     /*
         Use this when you have to alter the numSeconds in any of the specific assertions. For finder and hub, the values are appropriately coded
         keeping the start intervals in mind.
      */
     public static void sleepUntil(int numSeconds, Callable<Boolean> conditionEvaluator) {
-        await().pollDelay(numSeconds, TimeUnit.SECONDS).until(conditionEvaluator);
+        await().pollDelay(Duration.ofSeconds(numSeconds)).until(conditionEvaluator);
     }
 
     /*