Add Dockerfile and make-based tooling

Change-Id: I6471c3bc2040a0a9c9c49b45beee6fcd11c77a3c
diff --git a/grpc_service.go b/grpc_service.go
index 2a2df92..33993f6 100644
--- a/grpc_service.go
+++ b/grpc_service.go
@@ -18,8 +18,8 @@
 
 import (
 	"log"
+  "gerrit.opencord.org/voltha-bbsim/openolt"
 	"golang.org/x/net/context"
-	"./openolt"
 	"time"
 )
 
@@ -109,4 +109,4 @@
 		time.Sleep(1 * time.Second)
 	}
 	return nil
-}
\ No newline at end of file
+}