ONOS-3323 gRPC implementation of Remote Service

- Start modelling Device related service (ONOS-3306)
- exclude machine generated code from doc

Change-Id: Idffbcd883f813de79c6f05fedc9475f308efcc31
diff --git a/incubator/pom.xml b/incubator/pom.xml
index 5222fe9..8122a68 100644
--- a/incubator/pom.xml
+++ b/incubator/pom.xml
@@ -36,6 +36,7 @@
         <module>net</module>
         <module>store</module>
         <module>rpc</module>
+        <module>rpc-grpc</module>
     </modules>
 
     <dependencies>