NO-JIRA Fixing typos in log messages, test names and comments

Related to ARTEMIS-387 (fowardingAddress)
diff --git a/src/main/java/org/apache/activemq/artemis/jlibaio/util/CallbackCache.java b/src/main/java/org/apache/activemq/artemis/jlibaio/util/CallbackCache.java
index afde2fc..bfb9a2b 100644
--- a/src/main/java/org/apache/activemq/artemis/jlibaio/util/CallbackCache.java
+++ b/src/main/java/org/apache/activemq/artemis/jlibaio/util/CallbackCache.java
@@ -20,7 +20,7 @@
 import org.apache.activemq.artemis.jlibaio.SubmitInfo;
 
 /**
- * this is an utility class where you can reuse Callbackk objects for your LibaioContext usage.
+ * this is an utility class where you can reuse Callback objects for your LibaioContext usage.
  */
 public class CallbackCache<Callback extends SubmitInfo> {