Indexing retries: lower normal condition logs to debug

When the retry of indexing encounters normal conditions that
do not denote any issue, the logs should not emit anything for
not spamming the output and distracting the Gerrit admin.

Change-Id: I33fad03cab1c897f8db0645d3e3a0aa956844610
(cherry picked from commit 5bd23e89f90b9d23c5ff8d68c7935404fe5b535d)

src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/ForwardedIndexingHandlerWithRetries.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/ForwardedIndexingHandlerWithRetries.java b/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/ForwardedIndexingHandlerWithRetries.java
index f3d4e70..d135e39 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/ForwardedIndexingHandlerWithRetries.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/multisite/forwarder/ForwardedIndexingHandlerWithRetries.java
@@ -64,7 +64,7 @@
   protected boolean rescheduleIndex(T id) {
     IndexingRetry retry = indexingRetryTaskMap.get(id);
     if (retry == null) {
-      log.info(
+      log.debug(
           "{} {} successfully indexed by different task, rescheduling isn't needed",
           indexName(),
           id);
@@ -110,7 +110,7 @@
     IndexingRetry retry = new IndexingRetry(event);
     if (indexingRetryTaskMap.put(id, retry) != null) {
       indexOnce.accept(id);
-      log.info(
+      log.debug(
           "Skipping indexing because there is already a running task for the specified id. Index name: {}, task id: {}",
           indexName(),
           id);