Refactoring file structure for protobufs.

Change-Id: I50daf100d54750f97158304d87813e67861b1422
diff --git a/incubator/rpc-grpc/src/main/java/org/onosproject/incubator/rpc/grpc/LinkProviderServiceServerProxy.java b/incubator/rpc-grpc/src/main/java/org/onosproject/incubator/rpc/grpc/LinkProviderServiceServerProxy.java
index 26210f6..69f9cfd 100644
--- a/incubator/rpc-grpc/src/main/java/org/onosproject/incubator/rpc/grpc/LinkProviderServiceServerProxy.java
+++ b/incubator/rpc-grpc/src/main/java/org/onosproject/incubator/rpc/grpc/LinkProviderServiceServerProxy.java
@@ -31,7 +31,7 @@
 import org.onosproject.grpc.net.link.LinkService.LinkDetectedMsg;
 import org.onosproject.grpc.net.link.LinkService.LinkVanishedMsg;
 import org.onosproject.grpc.net.link.LinkService.Void;
-import org.onosproject.incubator.protobuf.net.ProtobufUtils;
+import org.onosproject.incubator.protobuf.models.ProtobufUtils;
 import org.onosproject.net.ConnectPoint;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.Link;