Dropping log level to debug in few places

Change-Id: I4b42d4f3edfc6e9cdd0822cfcb74d1070b0b7a70
diff --git a/utils/misc/src/main/java/org/onlab/util/BoundedThreadPool.java b/utils/misc/src/main/java/org/onlab/util/BoundedThreadPool.java
index 9d476d2..9eef660 100644
--- a/utils/misc/src/main/java/org/onlab/util/BoundedThreadPool.java
+++ b/utils/misc/src/main/java/org/onlab/util/BoundedThreadPool.java
@@ -119,7 +119,7 @@
         long prev = lastPrinted.get();
         if (now - prev > STATS_INTERVAL) {
             if (lastPrinted.compareAndSet(prev, now)) {
-                log.warn("queue size: {} jobs, submitted: {} jobs/s, taken: {} jobs/s",
+                log.debug("queue size: {} jobs, submitted: {} jobs/s, taken: {} jobs/s",
                          getQueue().size(),
                          submitted.throughput(), taken.throughput());
                 submitted.reset();