Log debug message when jni library is loaded, not info message (#69)

Signed-off-by: Ivan Santiago Paunovic <ivanpauno@ekumenlabs.com>

Author: ivanpauno

rcljava_common/src/main/java/org/ros2/rcljava/common/JNIUtils.java

@@ -43,14 +43,14 @@ private static String normalizeClassName(Class cls) {
   public static void loadImplementation(Class cls) {
     String libraryName = normalizeClassName(cls);
     libraryName = libraryName + "__jni";
-    logger.info("Loading implementation: " + libraryName);
+    logger.debug("Loading implementation: " + libraryName);
     System.loadLibrary(libraryName);
   }
 
   public static void loadTypesupport(Class cls) {
     String libraryName = normalizeClassName(cls);
     libraryName = libraryName + "__jni__" + JNIUtils.TYPESUPPORT;
-    logger.info("Loading typesupport: " + libraryName);
+    logger.debug("Loading typesupport: " + libraryName);
     System.loadLibrary(libraryName);
   }
 }