Add missing dependencies

Change-Id: Iab59f7eff74ce9ef083a921c941ed36ff8599f03
diff --git a/apps/dhcprelay/pom.xml b/apps/dhcprelay/pom.xml
index 3d86ddb..4344c83 100644
--- a/apps/dhcprelay/pom.xml
+++ b/apps/dhcprelay/pom.xml
@@ -82,6 +82,14 @@
         </dependency>
 
         <dependency>
+            <groupId>org.onosproject</groupId>
+            <artifactId>onos-incubator-api</artifactId>
+            <version>${project.version}</version>
+            <scope>test</scope>
+            <classifier>tests</classifier>
+        </dependency>
+
+        <dependency>
             <groupId>org.apache.felix</groupId>
             <artifactId>org.apache.felix.scr.annotations</artifactId>
             <scope>provided</scope>