ExternalIdNotes: Improve debug log on load

At this point we only load the external ID note map. Reading external
IDs only happens when an external ID from the note map is actually
accessed.

Change-Id: Ic491d3f92c3ff8cf1e6cdf2a4edf90f2a9b90a07
Signed-off-by: Edwin Kempin <ekempin@google.com>
diff --git a/java/com/google/gerrit/server/account/externalids/ExternalIdNotes.java b/java/com/google/gerrit/server/account/externalids/ExternalIdNotes.java
index b117888..9dd9bd8 100644
--- a/java/com/google/gerrit/server/account/externalids/ExternalIdNotes.java
+++ b/java/com/google/gerrit/server/account/externalids/ExternalIdNotes.java
@@ -656,7 +656,7 @@
 
   @Override
   protected void onLoad() throws IOException, ConfigInvalidException {
-    logger.atFine().log("Reading external IDs");
+    logger.atFine().log("Reading external ID note map");
 
     noteMap = revision != null ? NoteMap.read(reader, revision) : NoteMap.newEmptyMap();