Fix javadoc generation not working with JDK 11

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

Change-Id: I6ef2812bb7a4743a7119bdc8490637e1e95ea3f8
diff --git a/pom.xml b/pom.xml
index 92df763..0a53a38 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>