VOL-2189 Release v2 protos repo and update to use v2 imports

Change-Id: I93e776acb0a97d95d4df55721b283da7ac4494ac
diff --git a/protos/voltha_protos/adapter.proto b/protos/voltha_protos/adapter.proto
index 055de2b..8c2a0cc 100644
--- a/protos/voltha_protos/adapter.proto
+++ b/protos/voltha_protos/adapter.proto
@@ -1,6 +1,6 @@
 syntax = "proto3";
 
-option go_package = "github.com/opencord/voltha-protos/go/voltha";
+option go_package = "github.com/opencord/voltha-protos/v2/go/voltha";
 
 package voltha;