Releasing ONOS Maven Plugin v2.0

Change-Id: I2dd9e84359dd093e7205fe75df0d5c78f9c23fcd
diff --git a/tools/build/pom.xml b/tools/build/pom.xml
index 59ddd11..0e6e27e 100644
--- a/tools/build/pom.xml
+++ b/tools/build/pom.xml
@@ -85,6 +85,7 @@
                     <plugin>
                         <groupId>org.apache.maven.plugins</groupId>
                         <artifactId>maven-javadoc-plugin</artifactId>
+                        <version>3.0.1</version>
                         <executions>
                             <execution>
                                 <id>attach-javadocs</id>