Consistently use Files.list in FanoutReplicationConfig

Use Files.list in both places where fan-out config files are listed.

Change-Id: Ia67aec878b25abf176a79e3911cf221973f4cb84
diff --git a/src/main/java/com/googlesource/gerrit/plugins/replication/FanoutReplicationConfig.java b/src/main/java/com/googlesource/gerrit/plugins/replication/FanoutReplicationConfig.java
index 4a2f8c9..1fd425b 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/replication/FanoutReplicationConfig.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/replication/FanoutReplicationConfig.java
@@ -53,7 +53,7 @@
     config = replicationConfig.getConfig();
     removeRemotes(config);
 
-    try (Stream<Path> files = Files.walk(remoteConfigsDirPath, 1)) {
+    try (Stream<Path> files = Files.list(remoteConfigsDirPath)) {
       files
           .filter(Files::isRegularFile)
           .filter(path -> getFileExtension(path.toString()).equals("config"))