[ONOS-5876] YANG serializer helper utilits API

Change-Id: I0d04320fb16b1acd7bfef6dc76bb1f37bca2ce0c
diff --git a/runtime/pom.xml b/runtime/pom.xml
index 09d4b8b..b287993 100644
--- a/runtime/pom.xml
+++ b/runtime/pom.xml
@@ -29,6 +29,7 @@
 
     <modules>
         <module>api</module>
+        <module>utils</module>
     </modules>
 
     <dependencies>