[VOL-4292] OpenOLT Adapter changes for gRPC migration

Change-Id: I5af2125f2c2f53ffc78c474a94314bba408f8bae
diff --git a/internal/pkg/core/olt_state_transitions.go b/internal/pkg/core/olt_state_transitions.go
index efb1f29..6c3f77d 100644
--- a/internal/pkg/core/olt_state_transitions.go
+++ b/internal/pkg/core/olt_state_transitions.go
@@ -22,7 +22,7 @@
 	"reflect"
 	"runtime"
 
-	"github.com/opencord/voltha-lib-go/v6/pkg/log"
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
 )
 
 // DeviceState OLT Device state