[VOL-4292] OpenOLT Adapter changes for gRPC migration

Change-Id: I5af2125f2c2f53ffc78c474a94314bba408f8bae
diff --git a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
index c198e6a..826caa3 100644
--- a/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
+++ b/vendor/github.com/grpc-ecosystem/go-grpc-middleware/.gitignore
@@ -200,3 +200,5 @@
 
 #vendor
 vendor/
+
+.envrc
\ No newline at end of file