JCRVLT-478 do not log warning when classifier option is not used (#44)

diff --git a/src/main/java/org/apache/jackrabbit/filevault/maven/packaging/AbstractMetadataPackageMojo.java b/src/main/java/org/apache/jackrabbit/filevault/maven/packaging/AbstractMetadataPackageMojo.java
index 4f80238..d2d13d7 100644
--- a/src/main/java/org/apache/jackrabbit/filevault/maven/packaging/AbstractMetadataPackageMojo.java
+++ b/src/main/java/org/apache/jackrabbit/filevault/maven/packaging/AbstractMetadataPackageMojo.java
@@ -136,7 +136,7 @@
     Map<String, File> getEmbeddedFilesMap() {
         Map<String, File> map = getEmbeddedFilesMap(PROPERTIES_EMBEDDEDFILESMAP_KEY + classifier);
         if (map.isEmpty()) {
-            getLog().warn("Using regular embedded files map as classifier specific one does not exist!");
+            getLog().debug("Using regular embedded files map as classifier specific one does not exist!");
             map = getEmbeddedFilesMap(PROPERTIES_EMBEDDEDFILESMAP_KEY);
         }
         return map;