VOL-2111 use voltha-lib-go

Change-Id: I307c3c5648476d9bdc2c855be7d59bd9264665bd
diff --git a/adaptercore/olt_state_transitions.go b/adaptercore/olt_state_transitions.go
index bd410d3..d5edb63 100644
--- a/adaptercore/olt_state_transitions.go
+++ b/adaptercore/olt_state_transitions.go
@@ -21,7 +21,7 @@
 	"reflect"
 	"runtime"
 
-	"github.com/opencord/voltha-go/common/log"
+	"github.com/opencord/voltha-lib-go/pkg/log"
 )
 
 // DeviceState OLT Device state