Mute logging for missing fetch param in remote section

Pull-replication plugin can coexist with replication plugin. For setups
with a large number of remote sections logging every remote section
without fetch param cause a lot of noise in the logs during gerrit
startup.

Feature: Issue 12560
Change-Id: I1cfcff64e39fd171bf71fcb5456f2d47f7c40d15

src/main/java/com/googlesource/gerrit/plugins/replication/pull/SourceConfigParser.java

diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/SourceConfigParser.java b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/SourceConfigParser.java
index e7400ec..6dfed44 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/pull/SourceConfigParser.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/pull/SourceConfigParser.java
@@ -79,7 +79,7 @@
         if (!remoteConfig.getFetchRefSpecs().isEmpty()) {
           result.add(remoteConfig);
         } else {
-          logger.atWarning().log(
+          logger.atFine().log(
               "Skip loading of remote [remote \"%s\"], since it has no 'fetch' configuration",
               name);
         }