PushOne: Don't log refs to push at ERROR level

The log is informational, not an error, so log it at INFO
level.

Change-Id: Ic16264da744bd3df4f6f28ff2ad82fc6856f98b4
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java b/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
index c780932..c974f3a 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/PushOne.java
@@ -461,7 +461,7 @@
       return new PushResult();
     }
 
-    repLog.atSevere().log("Push to %s references: %s", uri, todo);
+    repLog.atInfo().log("Push to %s references: %s", uri, todo);
 
     return tn.push(NullProgressMonitor.INSTANCE, todo);
   }