gRPC migration

Change-Id: I3129ae27d7ee12a23c7046f0d877e8064f2fd7f4
diff --git a/internal/core/common.go b/internal/core/common.go
index 0d360ad..4f65a16 100644
--- a/internal/core/common.go
+++ b/internal/core/common.go
@@ -16,7 +16,7 @@
 
 package core
 
-import "github.com/opencord/voltha-lib-go/v4/pkg/log"
+import "github.com/opencord/voltha-lib-go/v7/pkg/log"
 
 var logger log.CLogger
 
diff --git a/internal/core/server.go b/internal/core/server.go
index 8a5dfd6..a2c609a 100644
--- a/internal/core/server.go
+++ b/internal/core/server.go
@@ -21,7 +21,7 @@
 	"encoding/json"
 	"fmt"
 	"github.com/gorilla/mux"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
 	"net/http"
 	"sync"
 )
diff --git a/internal/core/store.go b/internal/core/store.go
index a6d24fb..dd8d529 100644
--- a/internal/core/store.go
+++ b/internal/core/store.go
@@ -19,7 +19,7 @@
 import (
 	"context"
 	"fmt"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
 	"sync"
 )
 
diff --git a/internal/core/store_test.go b/internal/core/store_test.go
index 8d8d8f1..0896b6d 100644
--- a/internal/core/store_test.go
+++ b/internal/core/store_test.go
@@ -18,7 +18,7 @@
 
 import (
 	"context"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
 	"gotest.tools/assert"
 	"testing"
 )
diff --git a/internal/core/watcher.go b/internal/core/watcher.go
index eb328e1..125edeb 100644
--- a/internal/core/watcher.go
+++ b/internal/core/watcher.go
@@ -21,7 +21,7 @@
 	"encoding/json"
 	"fmt"
 	"github.com/opencord/bbsim-sadis-server/internal/utils"
-	"github.com/opencord/voltha-lib-go/v4/pkg/log"
+	"github.com/opencord/voltha-lib-go/v7/pkg/log"
 	v1 "k8s.io/api/core/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/watch"