[VOL-5567] Upgrade protos and remove deprecated dependencies

Change-Id: I61605ee294a3c5abe65ecf94a0fe647c6e3b8479
Signed-off-by: bseeniva <balaji.seenivasan@radisys.com>
diff --git a/vendor/google.golang.org/grpc/credentials/credentials.go b/vendor/google.golang.org/grpc/credentials/credentials.go
index c8e337c..06f6c6c 100644
--- a/vendor/google.golang.org/grpc/credentials/credentials.go
+++ b/vendor/google.golang.org/grpc/credentials/credentials.go
@@ -44,8 +44,7 @@
 	// A54). uri is the URI of the entry point for the request.  When supported
 	// by the underlying implementation, ctx can be used for timeout and
 	// cancellation. Additionally, RequestInfo data will be available via ctx
-	// to this call.  TODO(zhaoq): Define the set of the qualified keys instead
-	// of leaving it as an arbitrary string.
+	// to this call.
 	GetRequestMetadata(ctx context.Context, uri ...string) (map[string]string, error)
 	// RequireTransportSecurity indicates whether the credentials requires
 	// transport security.