Configuration: Fix FloggerFormatString pattern flagged by error prone

Build is failing with recent Error Prone version:

  Configuration.java:122: error: [FloggerFormatString]
  extra format arguments: used 0, provided 1
      log.atInfo().log("Loading configuration from {}", fileConfigFileName);
                      ^
    (see https://errorprone.info/bugpattern/FloggerFormatString)

Change-Id: Idd8514f6739ab83dbab9a2131c63947f19d8c3d3

src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java

diff --git a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java
index eb9722d..f28b7c9 100644
--- a/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java
+++ b/src/main/java/com/ericsson/gerrit/plugins/highavailability/Configuration.java
@@ -119,7 +119,7 @@
         new FileBasedConfig(sitePaths.etc_dir.resolve(configFileName).toFile(), FS.DETECTED);
     String fileConfigFileName = cfg.getFile().getPath();
     try {
-      log.atInfo().log("Loading configuration from {}", fileConfigFileName);
+      log.atInfo().log("Loading configuration from %s", fileConfigFileName);
       cfg.load();
     } catch (IOException | ConfigInvalidException e) {
       log.atSevere().withCause(e).log("Unable to load configuration from " + fileConfigFileName);