[VOL-5291] On demand statistics for ONU and OLT

Change-Id: I4850bb0f0d2235122cb0c1bcf835b3672bb34436
Signed-off-by: Akash Reddy Kankanala <akash.kankanala@radisys.com>
diff --git a/vendor/google.golang.org/grpc/status/status.go b/vendor/google.golang.org/grpc/status/status.go
index 5842303..bcf2e4d 100644
--- a/vendor/google.golang.org/grpc/status/status.go
+++ b/vendor/google.golang.org/grpc/status/status.go
@@ -77,9 +77,18 @@
 // FromError returns a Status representation of err.
 //
 //   - If err was produced by this package or implements the method `GRPCStatus()
-//     *Status`, the appropriate Status is returned.
+//     *Status` and `GRPCStatus()` does not return nil, or if err wraps a type
+//     satisfying this, the Status from `GRPCStatus()` is returned.  For wrapped
+//     errors, the message returned contains the entire err.Error() text and not
+//     just the wrapped status. In that case, ok is true.
 //
-// - If err is nil, a Status is returned with codes.OK and no message.
+//   - If err is nil, a Status is returned with codes.OK and no message, and ok
+//     is true.
+//
+//   - If err implements the method `GRPCStatus() *Status` and `GRPCStatus()`
+//     returns nil (which maps to Codes.OK), or if err wraps a type
+//     satisfying this, a Status is returned with codes.Unknown and err's
+//     Error() message, and ok is false.
 //
 //   - Otherwise, err is an error not compatible with this package.  In this
 //     case, a Status is returned with codes.Unknown and err's Error() message,
@@ -88,10 +97,29 @@
 	if err == nil {
 		return nil, true
 	}
-	if se, ok := err.(interface {
-		GRPCStatus() *Status
-	}); ok {
-		return se.GRPCStatus(), true
+	type grpcstatus interface{ GRPCStatus() *Status }
+	if gs, ok := err.(grpcstatus); ok {
+		if gs.GRPCStatus() == nil {
+			// Error has status nil, which maps to codes.OK. There
+			// is no sensible behavior for this, so we turn it into
+			// an error with codes.Unknown and discard the existing
+			// status.
+			return New(codes.Unknown, err.Error()), false
+		}
+		return gs.GRPCStatus(), true
+	}
+	var gs grpcstatus
+	if errors.As(err, &gs) {
+		if gs.GRPCStatus() == nil {
+			// Error wraps an error that has status nil, which maps
+			// to codes.OK.  There is no sensible behavior for this,
+			// so we turn it into an error with codes.Unknown and
+			// discard the existing status.
+			return New(codes.Unknown, err.Error()), false
+		}
+		p := gs.GRPCStatus().Proto()
+		p.Message = err.Error()
+		return status.FromProto(p), true
 	}
 	return New(codes.Unknown, err.Error()), false
 }
@@ -103,19 +131,16 @@
 	return s
 }
 
-// Code returns the Code of the error if it is a Status error, codes.OK if err
-// is nil, or codes.Unknown otherwise.
+// Code returns the Code of the error if it is a Status error or if it wraps a
+// Status error. If that is not the case, it returns codes.OK if err is nil, or
+// codes.Unknown otherwise.
 func Code(err error) codes.Code {
 	// Don't use FromError to avoid allocation of OK status.
 	if err == nil {
 		return codes.OK
 	}
-	if se, ok := err.(interface {
-		GRPCStatus() *Status
-	}); ok {
-		return se.GRPCStatus().Code()
-	}
-	return codes.Unknown
+
+	return Convert(err).Code()
 }
 
 // FromContextError converts a context error or wrapped context error into a