ONOS-4499 Correct missed dependences of routing app in VPLS.

Change-Id: I8a84692da53cbda5657d62cb6311c144efbee859
diff --git a/apps/vpls/pom.xml b/apps/vpls/pom.xml
index 720da97..4d027c8 100644
--- a/apps/vpls/pom.xml
+++ b/apps/vpls/pom.xml
@@ -50,6 +50,11 @@
         </dependency>
         <dependency>
             <groupId>org.onosproject</groupId>
+            <artifactId>onos-app-routing</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.onosproject</groupId>
             <artifactId>onos-api</artifactId>
             <version>${project.version}</version>
             <scope>test</scope>