Fix javadoc generation not working with JDK 11

By updating the maven-javadoc-plugin in onos-dependencies.

Change-Id: I780aeb9232dfbb2bac52f238cf5037c4bc24db33
diff --git a/pom.xml b/pom.xml
index ee818f7..e65d408 100644
--- a/pom.xml
+++ b/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-dependencies</artifactId>
-        <version>2.2.1-b2</version>
+        <version>2.2.1-b3</version>
     </parent>
 
     <groupId>org.opencord</groupId>