Set the retry log to debug level (#3184)

Co-authored-by: Sophie Guo <[email protected]>

Author: SophieGuo410

ambry-commons/src/main/java/com/github/ambry/commons/RetryExecutor.java

@@ -65,7 +65,7 @@ private <T> void recursiveAsyncRetry(Consumer<Callback<T>> call, Predicate<Throw
         int currAttempts = attempts + 1;
         if (currAttempts < policy.maxAttempts() && isRetriable.test(exception)) {
           int waitTimeMs = policy.waitTimeMs(currAttempts);
-          logger.info("{} of {} attempts failed, will keep retrying after a {} ms backoff. exception='{}'",
+          logger.debug("{} of {} attempts failed, will keep retrying after a {} ms backoff. exception='{}'",
               currAttempts, policy.maxAttempts(), waitTimeMs, exception);
           //Don't need the scheduler if no need to wait for retry and show warn message if scheduler is null but wait time larger than 0;
           if (scheduler == null) {
@@ -78,7 +78,7 @@ private <T> void recursiveAsyncRetry(Consumer<Callback<T>> call, Predicate<Throw
                 waitTimeMs, TimeUnit.MILLISECONDS);
           }
         } else {
-          logger.info("{} of {} attempts failed, completing operation. See exception below:", currAttempts,
+          logger.debug("{} of {} attempts failed, completing operation. See exception below:", currAttempts,
               policy.maxAttempts(), exception);
           userCallback.onCompletion(null, exception);
         }