Fix javadoc generation not working with JDK 11

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

Change-Id: I7bd79fc81714f89f154ebc559086b62a505817d1
diff --git a/pom.xml b/pom.xml
index 38a42fa..5f90e54 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>