Register onos.rsModel in maven-javadoc-plugin

Change-Id: Ib7b2f85214cd96f8fc97636b6589e884a9c2b0be
diff --git a/pom.xml b/pom.xml
index a6a4601..864ae54 100644
--- a/pom.xml
+++ b/pom.xml
@@ -47,6 +47,19 @@
                     <sourceDirectories>${project.build.sourceDirectory}</sourceDirectories>
                 </configuration>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+                <configuration>
+                  <tags>
+                      <tag>
+                          <name>onos.rsModel</name>
+                          <placement>m</placement>
+                          <head>Json model for REST api:</head>
+                      </tag>
+                  </tags>
+                </configuration>
+            </plugin>
         </plugins>
     </build>